Supplement Facts
Serving Size:  1 Tablet
Amount Per Serving
%DV
Vitamin C (as Ascorbic Acid)
500 mg
556%
Rose Hips Powder (Rosa canina) (fruit)
40 mg

The product is found useful for the following medical conditions

Bruise details

SCIENTIFIC SCORE
Moderately Effective
Based on 9 Researches
8.2
USERS' SCORE
Good
Based on 2 Reviews
8.6
We explored how vitamin C can impact bruising, particularly in individuals experiencing a deficiency. The research highlighted a case involving an elderly woman who faced challenges such as weakness, easy bruising, and fatigue due to a lack of this vital nutrient.

After beginning treatment with vitamin C supplements, we observed significant improvements in her symptoms, emphasizing the importance of this vitamin in healthier skin and tissue repair. It showcased that scurvy, a condition rooted in vitamin C deficiency, can still occur today, especially in certain at-risk populations.

This case reminds us that while scurvy might seem like a relic of the past, it can still affect modern individuals. Skin issues like easy bruising can sometimes signal deeper dietary concerns that need addressing, especially in older adults.
9
Effective bruise remedy
Most Useful Review
Satisfied with the good composition, and the natural vitamin is evident. It helps me maintain my health, particularly in relation to bruises. Whenever I cease taking it, bruises appear more frequently and take longer to heal; however, when I am on this vitamin, the rate at which bruises resolve increases significantly — they simply vanish “before our eyes.”

Eczema details

SCIENTIFIC SCORE
Possibly Effective
Based on 1 Research
7
USERS' SCORE
Good
Based on 2 Reviews
8.6
We assessed the impact of vitamin C and other nutrients on workers suffering from skin eczema due to their job in perlite production. The study involved a group of 165 workers with eczema and a control group of 152 workers without any skin issues, allowing us to compare the effects more accurately.

Participants were included on a specialized diet featuring kissel, rich in pectin, vitamin A, vitamin E, and zinc. Notably, we saw significant improvements in several important indicators. For instance, the levels of ascorbic acid in the blood increased by 30%, while tocopherol levels rose by 36.3%. Additionally, we observed enhanced levels of carotenoids, phosphorus, and calcium.

There was a notable reduction in malondialdehyde (MDA), which can indicate oxidative stress, alongside a slight increase in catalase activity, suggesting overall improvements in the body’s ability to fight inflammation. While these findings suggest a positive trend towards reducing symptoms such as itching and redness, it’s essential to note that the study didn't isolate the effects of vitamin C alone, leaving us without a clear conclusion on its specific role in relieving eczema.

Consequently, while the combination of nutritional factors, including vitamin C, shows promise in enhancing skin health and fighting occupational eczema, we need further research to fully understand how much of this benefit can be attributed to vitamin C by itself.
10
Eczema resolved
Most Useful Review
4 people found this helpful
I experienced a remarkable improvement in my skin. My eczema has disappeared, and I no longer suffer from itching or dry skin. I believe this natural product has provided reliable and effective results.

Sleep Apnea details

SCIENTIFIC SCORE
Possibly Effective
Based on 11 Researches
7.5
USERS' SCORE
Good
Based on 5 Reviews
8.6
We evaluated how vitamin C might improve endothelial function in patients with obstructive sleep apnea (OSA). In our study, we compared 10 individuals with untreated OSA to 10 matched control subjects without sleep issues. We measured how well blood vessels reacted to increased blood flow, known as flow-mediated dilation (FMD), using ultrasound before and after administering vitamin C.

Our findings revealed a significant difference: baseline FMD was lower in OSA patients compared to the control group. However, after an intravenous injection of vitamin C, the FMD in OSA patients improved dramatically, reaching levels similar to those seen in the healthy controls. Interestingly, vasoreactivity in the control subjects remained unchanged.

These results suggest that oxidative stress might be a key factor contributing to the endothelial dysfunction experienced by individuals with OSA. The positive response to vitamin C opens up exciting possibilities for exploring antioxidant treatments in managing cardiovascular issues related to OSA.
9
Restful sleep achieved
Most Useful Review
These help me sleep. I have taken them for months, sometimes using C500 or C1000 shortly before bed. I feel they assist in obtaining restful sleep.

Whooping Cough details

SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 3 Reviews
8.6
9
Quick cold relief
Most Useful Review
This has been a lifesaver during the initial days of a cold. I take shock doses early on and, as a result, I only experience a couple of days with a runny nose, without any fever or cough.

Anxiety details

SCIENTIFIC SCORE
Moderately Effective
Based on 1 Research
8
USERS' SCORE
Good
Based on 2 Reviews
8.5
We set out to explore how vitamin C influences anxiety-like behaviors in a model of autism caused by valproic acid (VPA). In our study, we used fourteen female rats that underwent specific treatments to induce autism in their offspring. After a period of observation, we treated male pups with daily injections of vitamin C for four weeks. Then, we assessed their behavior to see if there were any changes in anxiety levels.

Our findings suggested that vitamin C significantly reduced anxiety-like behaviors in these rats. This outcome is particularly promising considering that autism often brings associated anxiety. By measuring various brain oxidative stress markers, we also noted improvements in mental functioning and motor skills after vitamin C treatment. Overall, our work underscores the potential benefits of vitamin C as a supportive treatment for anxiety-related issues in autism, indicating a pathway for future research and therapeutic strategies.
9
Calmness achieved
Most Useful Review
After taking it regularly, my body feels calm and my anxiety has lessened. It also promotes anti-aging and has anti-inflammatory properties.

Frozen Shoulder details

SCIENTIFIC SCORE
Moderately Effective
Based on 1 Research
8
USERS' SCORE
Good
Based on 2 Reviews
8.5
In our controlled laboratory study, we aimed to investigate whether vitamin C could help prevent frozen shoulder, particularly the secondary type that often occurs after trauma or surgery. We created a shoulder contracture model using Sprague-Dawley rats, which involved immobilizing their right shoulder.

Our experimental group, consisting of eight rats, received vitamin C orally, while a control group of nine rats did not receive vitamin C. We primarily measured the thickness of the joint capsule at the shoulder using magnetic resonance imaging (MRI).

The results were promising, indicating that vitamin C may reduce the thickening of the joint capsule linked to secondary frozen shoulder. Although we also conducted histological examinations, we did not perform statistical analysis on those findings due to variability in our cutting techniques.

This preclinical study suggests that vitamin C could be a valuable, non-invasive way to prevent secondary frozen shoulder, particularly in situations involving surgery or immobilization. However, more research is needed to determine its effects on humans and establish proper dosage guidelines.
7.5
Effective for pain
Most Useful Review
Rose hip with vitamin C helps significantly with my shoulder pain.

Kidney Stones details

SCIENTIFIC SCORE
Questionable
Based on 8 Researches
6.9
USERS' SCORE
Good
Based on 2 Reviews
8.5
We examined the relationship between vitamin C intake and the risk of developing kidney stones in a large cohort. This study included a significant number of participants: 156,735 women from the Nurses' Health Studies and 40,536 men from the Health Professionals Follow-up Study.

Our findings revealed that total and supplemental vitamin C intake was linked to a higher risk of kidney stones in men, but there was no such association evident in women. Specifically, among men, those who consumed higher amounts of vitamin C had greater likelihoods of developing stones when compared to those with lower intakes.

However, dietary vitamin C did not show a connection with kidney stones in either men or women. This suggests that while supplements may pose risks for men, dietary sources of vitamin C might not have the same impact. Overall, the study indicates that we should be cautious about high vitamin C supplement consumption, especially for men, while highlighting that dietary intake appears safe.
9
Enhanced kidney function
Most Useful Review
The vitamins and rose hips significantly improve kidney function and assist in eliminating excess fluid from the body, which helps reduce swelling and congestion.

Tonsillitis details

SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 3 Reviews
8.5
9
Immunity boost
Most Useful Review
The composition is excellent, with nothing superfluous. I've been using Vitamin C and rose hips in their natural forms for many years. The tablets are oval, beige with small dark speckles, measuring about 1.7 cm. They don't have a strong aroma, just a faint scent reminiscent of dried berries. With daily use, I've noticed a boost in immunity; despite going out in the cold a few times without a hat and consuming cold water, I’ve avoided tonsillitis. I take 3-4 tablets at the first signs of a sore throat, and the discomfort subsides quickly. Although the taste is quite sour, akin to dissolving a lemon slice, the quick effect and lack of heartburn are significant advantages.

Yeast Infection details

SCIENTIFIC SCORE
Likely Very Effective
Based on 2 Researches
9
USERS' SCORE
Good
Based on 2 Reviews
8.5
We explored the potential of vitamin C in combination with theasaponins to combat yeast infections, specifically focusing on their collective effectiveness. In this study, we used a method designed to test various concentrations of vitamin C along with theasaponins, aiming to assess how these components work together against the yeast that causes infections.

The results were telling; vitamin C significantly enhanced the ability of theasaponins to target both the yeast's active cells and its biofilm formations, which are crucial for survival. With added vitamin C, we noted a remarkable decrease in the minimum amount of theasaponins needed to inhibit growth, indicating that the combination is more potent together than alone.

Interestingly, this collaboration seemed to struggle against the yeast's communication and defense mechanisms, creating more oxidative stress and damage to cellular structures. By analyzing gene activity, we observed that the combination of vitamin C and theasaponins disrupted essential metabolic pathways, suggesting a powerful effect against the yeast.

Overall, our findings support the idea that vitamin C can play a critical role in enhancing treatments for yeast infections, showcasing its potential as part of an effective topical antifungal approach.
9
Positive healing effects
Most Useful Review
2 people found this helpful
I've been taking the Vitamin C from the Now brand and I'm very pleased with the results. I began taking it when I felt a cold coming on, consuming one 500 mg tablet of ascorbic acid daily. It helped keep the symptoms at bay and shortened the duration of the virus. I also used it for inflamed skin, and it aided in drying and healing that area more quickly. I gave it to my husband for a couple of weeks after he sprained his wrist, and it certainly assisted in his recovery. Vitamin C is beneficial for skin infections and injuries. I prefer the tablet form; it's easy to swallow, being of a manageable size. Given our positive experiences with Now Foods Vitamin C, I wholeheartedly recommend it.

Acne details

SCIENTIFIC SCORE
Possibly Effective
Based on 16 Researches
7.6
USERS' SCORE
Good
Based on 6 Reviews
8.4
In our recent study, we set out to explore the effectiveness of a 5% sodium L-ascorbyl-2-phosphate lotion, a stable form of vitamin C, for treating acne. We conducted a double-blind, controlled trial with 50 participants over 12 weeks, where half used the vitamin C lotion and the other half received a placebo.

Our findings revealed significant improvements in acne symptoms for those using the vitamin C lotion compared to the placebo group. We measured outcomes through various assessments, including a global evaluation by investigators and self-reported assessments by the subjects, along with lesion counts.

The results showed that the vitamin C lotion was not only effective but also well-tolerated, with side effects similar to those seen with the placebo. This adds a promising tool to the options available for acne treatment, suggesting that vitamin C might play a valuable role in skincare regimens aimed at combating acne.

Overall, our study supports the idea that vitamin C, in the form of sodium L-ascorbyl-2-phosphate, can help reduce acne, making it a noteworthy addition to acne treatment strategies.
9
Acne improvement
Most Useful Review
Buy now! Believe it or not, my persistent white bleeding acne has disappeared after regularly taking this for four years. Initially, I took two tablets a day, but I have now reduced the dose. It works!!!

Bone Pain details

SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 6 Reviews
8.4
9
Reduced joint pain
Most Useful Review
2 people found this helpful
An effective immune support product. I took it for my mother to help with bone pain and joint health. She took one tablet of Vitamin C in the form of ascorbic acid after meals, three times a day. The results are commendable; her joint discomfort has decreased significantly, and she feels happier. The quality and ingredients are excellent.

Adenoiditis details

SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 15 Reviews
8.3
9
Effective for colds
Most Useful Review
2 people found this helpful
An effective remedy against viral diseases, colds, and flu. At the first signs, like snot and sore throat, I take two pills, and I also give my teenage son one. Most times, we can stave off the illness early. The tablets contain rosehip, a natural source of vitamin C and an antioxidant. They are quite sour, so I recommend taking them after meals with water. Each contains 500 mg of vitamin C and is satisfactory in quality, with 250 tablets lasting a long time.

Headache details

SCIENTIFIC SCORE
Moderately Effective
Based on 2 Researches
8
USERS' SCORE
Good
Based on 2 Reviews
8.3
We aimed to understand how dietary vitamin C affects migraines by analyzing data from the National Health and Nutrition Examination Survey, conducted from 1999 to 2004. In this survey, we identified adults who reported experiencing severe headaches or migraines over the past three months.

Our findings were quite revealing. Out of 4,101 participants, 702 individuals reported having a migraine, which represents about 17% of the group. We discovered an interesting trend: higher dietary vitamin C intake seemed to correlate with a lower likelihood of experiencing migraines. Specifically, participants with the highest vitamin C intake had a 36% reduced odds of suffering from migraines compared to those with the lowest intake.

We employed various statistical methods to confirm our results, including logistic regression and restricted cubic spline regression, which showed a clear linear relationship between vitamin C intake and the frequency of migraines.

Overall, this study suggests that increasing our dietary vitamin C might help minimize migraines, which is promising news for those who suffer from these intense headaches. However, as with all studies, further research is necessary to solidify these findings and fully understand the relationship between vitamin C and headache relief.
7.5
Frequency reduced
Most Useful Review
12 people found this helpful
This product helps prevent headaches! I used to suffer from splitting headaches daily, but after taking it, the frequency has significantly decreased to once every five days or less. No painkillers provide full relief, just minimal alleviation. I've learned that vitamin C is beneficial for headaches, especially when combined with bioflavonoids, so I consume it after breakfast. If you've been feeling unwell, it may not be effective, but for chronic headaches, taking it systematically every morning works wonders! I hope my review helps someone.

Hypothyroidism details

SCIENTIFIC SCORE
Moderately Effective
Based on 11 Researches
8
USERS' SCORE
Good
Based on 2 Reviews
8.3
We set out to examine how total vitamin C intake might influence hypothyroidism in individuals with Hashimoto thyroiditis, using data from the National Health and Nutrition Examination Survey conducted between 2007 and 2012. Our study utilized multivariate logistic regression and restricted cubic spline analyses to uncover possible associations.

What we found was quite intriguing. There was a clear negative linear relationship between total vitamin C intake and hypothyroidism. Specifically, participants who consumed higher amounts of vitamin C had a significantly lower likelihood of developing hypothyroidism. Those in the top quartile of vitamin C intake were about 60% less likely to have hypothyroidism compared to those in the lowest quartile.

This pattern remained consistent across different age groups and sexes, further emphasizing the potential benefits of vitamin C for individuals with Hashimoto's. Our findings suggest that increasing vitamin C intake may be a simple and effective strategy for reducing the risk of hypothyroidism in those affected. The data indicates that consuming between 4.57 and 1258.9 mg/day of vitamin C could be beneficial.

Overall, our research adds to the understanding of how antioxidants like vitamin C can play a role in thyroid health, encouraging us to consider dietary sources of this vital vitamin for those managing Hashimoto's thyroiditis.
7.5
Effective for hypothyroidism
Most Useful Review
Excellent Vitamin C with Bioflavonoids. My family enjoys it daily. The children take it once a day, and I increase the dosage if I suspect the onset of illness. As someone with hypothyroidism, I take it three times a day.

Stroke details

SCIENTIFIC SCORE
Moderately Effective
Based on 4 Researches
8.3
USERS' SCORE
Good
Based on 4 Reviews
8.3
We explored how vitamin C stimulation affects the recovery of stroke patients suffering from dysphagia, a condition that makes swallowing difficult. In a carefully designed study involving 120 stroke patients, we divided them into two groups: one received traditional swallowing training, while the other group was given vitamin C stimulation alongside their training.

Our findings highlighted that those who received vitamin C showed marked improvements in their ability to swallow, as reflected in assessments such as the water swallow test and video fluoroscopic swallowing study. Additionally, we observed enhancements in their nutritional status and immune function, measured by indices like serum albumin and immunoglobulins.

Overall, it seems that vitamin C isn’t just a vitamin; it may play a vital role in helping stroke patients recover more effectively from dysphagia. This evidence supports using vitamin C as a beneficial component in stroke rehabilitation plans.
9
Essential for health
Most Useful Review
Great product! I take one capsule daily, and if I feel cold symptoms, I increase to two. This vitamin is vital for body functioning, as it reduces the risk of chronic diseases, protects against strokes, heals wounds, strengthens bones, and enhances brain function. I also take it with calcium and magnesium for better absorption. Stay healthy!

Adrenal Gland Disorder details

SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 5 Reviews
8.2
9
Gradual recovery
Most Useful Review
3 people found this helpful
If taking a capsule, it sometimes feels as though it sticks in my throat, so I now prefer tablets. Following a respiratory illness with unknown high fever a few years back, I’ve been experiencing chronic fatigue and have visited numerous hospitals. Despite no conclusive diagnosis in Western medicine, I turned to Oriental medicine. I've tried various supplements, but only Vitamin C (with bioflavonoids) has had a noticeable effect. I've been on this for about 3 years now, and my physical strength and quality of life are improving. Currently, I take around 500mg in two tablets daily. If I miss a dose, my mouth can become rough or bleed when brushing my teeth, indicating its effectiveness.

Anemia details

SCIENTIFIC SCORE
Possibly Effective
Based on 8 Researches
7.9
USERS' SCORE
Good
Based on 6 Reviews
8.2
We observed a fascinating phenomenon related to vitamin C and anemia during a series of cases in a prison setting in Ethiopia. Specifically, we examined how scurvy, a disease caused by a lack of vitamin C, contributed to anemia among prisoners.

Our study focused on ten patients who were admitted for treatment, all of whom presented with some form of leg swelling or pain. After administering vitamin C in the form of ascorbic acid, we noted a significant increase in hemoglobin levels, rising from an average of 4.6 to 7.1 g/dL. This improvement indicates that vitamin C may play a crucial role in alleviating some anemia symptoms when the underlying cause is related to dietary deficiencies.

Additionally, through an observational study involving 67 other patients in the same prison, we confirmed that leg swelling and pain were common symptoms among those affected. With consistent therapeutic doses of vitamin C, all patients showed considerable improvement in their conditions.

Thus, we can conclude that vitamin C does seem to have a valuable effect on anemia caused by dietary deficiencies, particularly in high-risk environments like prisons. This finding encourages healthcare providers to remain vigilant about such nutritional deficiencies and highlights the importance of vitamin C in treatment.
9
Boosts immunity
Most Useful Review
1 people found this helpful
Excellent quality vitamin C! I previously had anemia and felt tired; my doctor recommended vitamin C to enhance iron absorption. This product improved my immunity and overall health significantly!

Cancer details

SCIENTIFIC SCORE
Likely Very Effective
Based on 1 Research
9
USERS' SCORE
Good
Based on 4 Reviews
8.2
We delved into how vitamin C might influence cancer treatment, focusing on its effects on the immune system. Our findings revealed that vitamin C directly modifies certain proteins, leading to a new type of protein change called vitcylation. This process specifically affects a protein known as STAT1.

By modifying STAT1, vitamin C enhances its ability to signal for immune responses. We found that this modification occurs in both controlled environments and living cells, depending on factors like dosage and acidity. As a result of vitcylation, the action of STAT1 is improved, which activates important immune responses in tumor cells and boosts the expression of molecules that help the immune system recognize and attack cancer cells.

Interestingly, this research sheds light on the potential of vitamin C as a treatment that not only affects cancer directly but also empowers the body’s own defenses. These insights pave the way for new approaches to cancer therapy that leverage the immune system in conjunction with vitamin C.
9
Survivor advocate
Most Useful Review
This sustained release Vitamin C has kept me healthy for over a year! As a cancer survivor with no immune system, I recommend it to everyone and even share orders with my family.

Chronic Cough details

SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 5 Reviews
8.2
9
Supports immune health
Most Useful Review
Vitamin C is excellent for maintaining immunity, particularly during illness like flu or chronic cough. I take it promptly to recover more swiftly.

Cough details

SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 4 Reviews
8.2
9
Coughs eliminated quickly
Most Useful Review
Excellent base supplement! I will take it regularly, especially during the cold season, as it helps mitigate symptoms in just two days—eliminating snot, cough, and sneezes as if by magic. I combine it with vitamin D.

High Cholesterol details

SCIENTIFIC SCORE
Moderately Effective
Based on 6 Researches
8
USERS' SCORE
Good
Based on 10 Reviews
8.2
We explored how vitamin C supplementation affects cholesterol levels in broiler chickens, particularly under heat stress conditions. Through a thorough meta-analysis of 35 studies conducted between 1985 and 2023, we assessed various performance metrics, including blood parameters, carcass characteristics, and overall meat quality.

Our findings revealed that vitamin C significantly reduced cholesterol levels in the broiler chickens subjected to heat stress. Specifically, the study reported a notable decrease in cholesterol concentrations, with a standard mean difference of -0.976, indicating a strong beneficial effect of vitamin C in managing high cholesterol.

Additionally, we noticed improvements in body weight and average daily gain among chickens receiving vitamin C when compared to those that did not. While vitamin C did not significantly impact feed intake or breast meat quality, it emerged as a valuable antioxidant that can help lower blood triglycerides and reduce cholesterol, thus promoting better overall health and growth in broilers during stressful conditions.

Ultimately, this meta-analysis supports the use of vitamin C at a recommended dosage of 250 mg/kg as an effective growth promoter and antioxidant in broiler diets under heat stress, directly influencing cholesterol management.
9
High quality choice
Most Useful Review
1 people found this helpful
A great choice with high CP. The product has excellent quality and clear ingredients. Highly recommended, but ensure to check local regulations in Taiwan regarding dosage.

Allergies details

SCIENTIFIC SCORE
Moderately Effective
Based on 1 Research
8
USERS' SCORE
Good
Based on 9 Reviews
8.1
We conducted a thorough evaluation of how vitamin C, when combined with pleuran, impacts asthma control and respiratory issues in children suffering from perennial asthma. The study was meticulously designed as a double-blind, placebo-controlled trial involving 230 children aged 7 to 17 years. This means that neither the participants nor the researchers knew who was receiving the active treatment or the placebo, ensuring the findings were reliable.

The results were promising, especially for children under 12 years. They showed significant improvements in asthma control compared to those receiving only the placebo treatment. Meanwhile, older children (12 years and above) experienced fewer respiratory infections with the combination treatment. Overall, by the end of the 48 weeks, a majority of children on the pleuran and vitamin C treatment reported better asthma control compared to those on the placebo.

While the combination of pleuran and vitamin C was indeed beneficial for managing asthma, we must note that the study did not specifically isolate the effect of vitamin C alone on allergies or asthma. Thus, it is hard to draw definitive conclusions about vitamin C's effectiveness independently from pleuran. However, the approach suggested that using these supplements together could offer a helpful boost in managing asthma symptoms.
9
Good for pets
Most Useful Review
1 people found this helpful
These small granules of vitamin C are easy for children and pets to swallow. I've noticed improvements with their allergies and inflammation issues after giving them 2-10 doses depending on their condition.

Bacterial Infection details

SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 10 Reviews
8.1
9
Fights bacterial infection
Most Useful Review
Ascorbic acid is a potent antioxidant and regenerative agent that combats bacterial infections and aids in detoxification. It also supports the formation of collagen in fibrous tissue, teeth, bones, connective tissues, and skin.

Cold details

SCIENTIFIC SCORE
Moderately Effective
Based on 2 Researches
8
USERS' SCORE
Good
Based on 490 Reviews
8.1
We explored the effects of vitamin C on the common cold and pneumonia by examining a range of studies. Interestingly, research on animals suggests that vitamin C may have protective effects against infections. However, when it comes to preventing colds in the general population, taking more than 1 gram of vitamin C per day didn’t show significant benefits.

But there's a twist! Participants engaged in heavy physical activities saw their cold incidence reduced by half with vitamin C supplementation. Additionally, regular intake of 1 gram or more daily was linked to a 15% decrease in cold severity. While some therapeutic trials showed inconsistent results when vitamin C was taken after cold symptoms appeared, two studies did indicate that larger doses (6-8 grams per day) could effectively shorten the duration of colds compared to lower doses.

Our investigation also looked into pneumonia, but the studies were conducted in unique settings, such as a boarding school and military recruits. This makes it hard to generalize the findings to the wider population. Yet, some trials suggested benefits for pneumonia patients. Finally, the role of vitamin C in treating COVID-19 and sepsis remains unclear, with mixed results.

Given that vitamin C seems to alleviate symptoms and shorten the duration of colds, while being safe and affordable, it might be worth considering a dose of 6-8 grams per day to see if it helps at an individual level.
9
Invaluable during cold
Most Useful Review
194 people found this helpful
Vitamin C during the cold season is essential! Unfortunately, you need to consume a lot of tangerines and oranges to achieve the required dose, increasing the risk of citrus allergies. I purchase numerous products from this brand, and I am pleased with this vitamin C—my second purchase. With 250 tablets per jar, it’s quite affordable and lasting. Rosehip in the ingredients also serves as an excellent antioxidant. We take one tablet daily and increase to two during illness; they really do help prevent colds. Highly recommend!

Common Cold details

SCIENTIFIC SCORE
Possibly Effective
Based on 7 Researches
7.4
USERS' SCORE
Good
Based on 90 Reviews
8.1
We explored how vitamin C affects the severity of common colds through a comprehensive review of available studies. By including only randomized, placebo-controlled trials where participants received at least 1 gram of vitamin C daily, we aimed to investigate both the overall duration of colds and the intensity of symptoms experienced.

Our analysis found that vitamin C significantly reduced the severity of cold symptoms by about 15%. Interestingly, it appears that the benefits are more pronounced for those experiencing severe symptoms compared to mild ones. In specific comparisons, vitamin C didn’t substantially affect the duration of mild symptoms but had a notable impact on how long severe symptoms lasted.

This insight is crucial, as the common cold often leads to absenteeism at work and school, with more severe symptoms playing a key role in this setback. By highlighting vitamin C's greater effectiveness against intense cold symptoms, we suggest that future research should continue to look into how this vitamin can be utilized in managing cold severity.
9
Prevents common cold
Most Useful Review
295 people found this helpful
Vitamin C from iHerb has been part of my first aid kit for three years, and I've purchased it five times. I typically take 3000-4000 mg at the first signs of a common cold, which usually stops it from developing. I now take one 500 mg tablet daily, as I have iron deficiency anaemia. The packaging is convenient, and the vitamins are easy to swallow. However, it’s crucial to monitor blood thickness when taking vitamin C.

Flu details

SCIENTIFIC SCORE
Possibly Effective
Based on 5 Researches
7.2
USERS' SCORE
Good
Based on 57 Reviews
8.1
We examined the effects of vitamin C on pneumonia caused by the influenza virus, specifically the H1N1 strain, in mice under stress. The study found that when exposed to restraint stress, the mice experienced increased mortality and more severe pneumonia symptoms.

However, by giving them oral vitamin C at doses of 125 and 250 mg/kg, we observed a significant reduction in these severe outcomes. Vitamin C seemed to modulate the expression of certain genes related to the immune response, such as MAVS and IRF3, and increased the expression of NF-κB, which plays a key role in the body's antiviral defense.

Our research suggested that vitamin C's protective effects might stem from its ability to inhibit excess cortisol production in the adrenal gland, which is often elevated due to stress. By lowering cortisol levels, vitamin C may help reduce susceptibility to influenza infections, making it a potential ally during the flu season, especially for those experiencing stress.

Through these findings, we highlighted a new mechanism for how vitamin C can be beneficial during influenza infections, particularly for those who are feeling overwhelmed.
9
Effective against flu
Most Useful Review
8 people found this helpful
A vital supplement at this time, I use it to combat viruses. The Now company offers a superb product with great dosage options and a fantastic price. After catching the flu, I took two tablets daily, and within a week, I regained my health.

Heartburn details

SCIENTIFIC SCORE
Moderately Effective
Based on 1 Research
8
USERS' SCORE
Good
Based on 9 Reviews
8.1
We investigated how vitamin C, specifically in the form of a 2% vitamin C solution spray, could help alleviate heartburn symptoms following Lugol chromoendoscopy, a procedure that involves staining the esophagus to better visualize abnormalities. In a well-structured study with 240 participants, we used a randomized, double-blind approach to compare the effectiveness of vitamin C to normal saline and sodium thiosulfate solutions.

Our results showed that vitamin C spray significantly reduced both acute heartburn symptoms and late discomfort when compared to the saline solution. Specifically, 33% of participants using vitamin C reported relief from acid regurgitation or heartburn, compared to just 15% with sodium thiosulfate. Additionally, patients noted an improvement in retrosternal pain, with 21% finding relief from the vitamin C treatment versus 9% from sodium thiosulfate.

Furthermore, vitamin C offered a quicker discoloration of the iodine-stained mucosa compared to saline, enhancing the overall experience of the procedure. These findings suggest that incorporating vitamin C spray into post-procedural care could be a helpful strategy for patients facing discomfort after undergoing Lugol chromoendoscopy.
9
No heartburn noted
Most Useful Review
4 people found this helpful
Good; it does not cause heartburn!

Knee Pain details

SCIENTIFIC SCORE
Possibly Effective
Based on 11 Researches
7.9
USERS' SCORE
Good
Based on 6 Reviews
8.1
We observed an intriguing case involving a 4.5-year-old boy who developed significant knee pain due to a rare nutritional deficiency, scurvy. This condition stemmed from his exclusive intake of meat over the past two years, resulting in skeletal issues and inflammation in multiple joints, including his knees.

Upon examination, the child exhibited several symptoms, including pain, swelling, and an inability to walk. Standard blood tests primarily indicated anemia, but X-rays revealed alarming conditions related to scurvy, such as delayed bone age and severe osteopenia. This alarming picture led us to the conclusion that vitamin C deficiency was the underlying culprit behind his knee pain and skeletal issues.

After initiating vitamin C therapy, we noted a remarkable reduction in pain and swelling over the next two months. The child’s condition improved significantly, allowing him to walk again, and follow-up X-rays confirmed the positive changes in his bone health. This case clearly illustrates how vitamin C can effectively alleviate knee pain related to scurvy and reinforces the importance of proper nutrition for overall skeletal health.
7.5
Reduces inflammation
Most Useful Review
2 people found this helpful
I feel very well taking this product. It reduces my pains and overall inflammation, along with decreasing headaches. It's easy to swallow and I carry a smaller bottle as a travel size in my purse. At the first sign of sickness, I take it until I feel better, sometimes in a larger dose. I'm taking it on a daily basis, 1-2 grams. I love the rose hip addition; it works great and doesn't irritate my stomach, even when taken on an empty stomach. :)

Brain Tumor details

SCIENTIFIC SCORE
Possibly Effective
Based on 12 Researches
7.8
USERS' SCORE
Good
Based on 4 Reviews
8
We aimed to understand how a lack of vitamin C influences the growth of glioblastoma, one of the most aggressive types of brain tumors. Using guinea pigs, we tested the effects of a vitamin C-deficient diet on tumor growth caused by two different human glioblastoma cell lines, U87-MG and HSVT-C3.

Through this study, we observed that the absence of vitamin C significantly hindered tumor proliferation in both models. Notably, we found that vitamin C deficiency reduced factors associated with tumor growth, such as vasculature and immune cell infiltration, particularly in the HSVT-C3 cells, which are known for their stem cell-like properties.

Our findings suggest that vitamin C plays a crucial role in supporting tumor growth, and when absent, it can lead to a notable reduction in glioblastoma progression. This emphasizes the potential importance of maintaining adequate vitamin C levels for patient outcomes in brain tumor scenarios.
7.5
Stress relief
Most Useful Review
Antioxidants stabilise conditions such as insomnia, depression, autonomic disorders, and other states like menopause or old age. The ingredients are of natural quality, relieving excess stress, stimulating brain function, improving concentration, and normalising sleep and mood. The medium-sized capsules contain GABA, which enhances sleep quality by limiting stress effects and promoting deeper sleep when growth hormone is predominantly released. The dosage is optimal.

Chronic Fatigue Syndrome details

SCIENTIFIC SCORE
Possibly Effective
Based on 5 Researches
7
USERS' SCORE
Good
Based on 15 Reviews
8
We examined how a combination of megadose vitamin C infusions and other treatments might help manage chronic fatigue syndrome, particularly in the context of interstitial pneumonia. Our findings were based on nearly a decade of treating patients, allowing us to gather valuable insights.

We observed that the long-term use of this treatment system significantly reduced the risk of pneumonia recurrence. It also appeared to help prevent the emergence of certain cancers in older patients suffering from interstitial pneumonia. Surprisingly, we found a link between interstitial pneumonia and an increased risk of depression, likely driven by prolonged glucocorticoid use.

While some patients showed promise under this treatment, those battling both interstitial pneumonia and depression responded less favorably. We suggested that increasing the amount of dehydroepiandrosterone in the treatment could be beneficial. Throughout our experience, we noted that the characteristics of chronic fatigue syndrome align closely with those of interstitial pneumonia, arguing against the notion that they should be viewed as separate conditions.

Overall, our approach not only alleviated inflammation but did not suppress the fibrotic processes in the long run. We made modifications to the treatment to lower the risks of vascular complications. The main strength of our treatment lies in creating a hormonal environment that helps tackle immune deficiencies using vitamin C, which faces lower resistance in the body compared to steroid treatments.
9
Improved quality of life
Most Useful Review
3 people found this helpful
Tablets sometimes stick in my throat, so I prefer using pills. After a severe respiratory illness, I experienced chronic fatigue syndrome and have tried many supplements. The only one that had a clear effect was Vitamin C with bioflavonoids. After three years of use, I've noticed my strength improving and quality of life enhancing. Missing doses can lead to roughness in my mouth, indicating its effectiveness.

Cold Sores details

SCIENTIFIC SCORE
Moderately Effective
Based on 3 Researches
8.3
USERS' SCORE
Moderately Good
Based on 3 Reviews
7.9
We investigated how an ascorbic acid-based solution could help treat recurrent cold sores, also known as mucocutaneous herpes. This study was carefully designed as a randomized, double-blind, placebo-controlled trial, which helps ensure the results are reliable and trustworthy.

Participants used a strong solution of Ascoxal, rich in vitamin C, applied to their cold sores multiple times on the first day of the outbreak. We monitored various symptoms daily, including the severity of scabs, redness, and blisters, comparing the experiences of those using the vitamin C solution to a placebo group.

Our findings were promising: the active treatment resulted in fewer days with scabbing and less severe symptoms overall. Moreover, those using the vitamin C solution showed reduced persistence of scabs compared to the placebo group, along with a lower frequency of detected herpes virus after treatment.

In conclusion, this brief course of vitamin C treatment appears to have significant clinical benefits against cold sores, opening the door for future research on more extensive and frequent treatment regimes.
9
Effective remedy
Most Useful Review
1 people found this helpful
Every time I or a family member feel faint pain in the throat, signalling cold sores, we take a Now C-500 with Rose hips pill, and within a few hours the pain subsides. Now not only do I use it, but my parents and sister's family do as well. I will continue to use this product.

Constipation details

SCIENTIFIC SCORE
Moderately Effective
Based on 1 Research
8
USERS' SCORE
Moderately Good
Based on 2 Reviews
7.9
We conducted a fully decentralized clinical trial to explore the effects of vitamin C on constipation symptoms. Participants who experienced functional constipation were randomly assigned to receive either Lactobacillus with vitamin C or vitamin C alone over a two-week treatment period. The study allowed us to gather data remotely, which is quite innovative and accessible.

Looking specifically at the results from the group that received vitamin C, we observed that while there was an increase in the frequency of bowel movements compared to the control group, the isolated effect of vitamin C itself wasn't entirely clear. The combination treatment appeared to improve bowel regularity, but it was difficult to determine how much vitamin C contributed independently to these results.

Additionally, we found that about 67% of participants were diligent in tracking their bowel diary entries, which helped ensure the reliability of our findings to an extent. Yet, a significant portion of the records were not kept as scheduled, highlighting potential hurdles in data collection for decentralized trials.

Overall, our observations suggest that while vitamin C, especially when paired with Lactobacillus, may provide some benefits for those struggling with constipation, we should exercise caution before attributing all improvements solely to vitamin C.
7.5
No constipation
Most Useful Review
Good composition, excellent ingredients. It does not cause constipation. High vitamin dosage. A super product I recommend to everyone.

Pelvic Pain details

SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Moderately Good
Based on 3 Reviews
7.9
7.5
Reduced inflammation
Most Useful Review
I began taking vitamin C tablets after discovering their benefits for reducing inflammation. After a few weeks, I've noticed a significant decrease in my joint pain. I highly recommend vitamin C tablets for anyone seeking relief.

Nausea details

SCIENTIFIC SCORE
Very Likely Ineffective
Based on 1 Research
2
USERS' SCORE
Moderately Good
Based on 4 Reviews
7.4
We explored the effects of vitamin C as a treatment for nausea and vomiting in pregnancy, also known as emesis gravidarum. Our study involved 111 participants, who were given either vitamin C-containing chewing gum, a placebo, or no treatment at all. We monitored them over two follow-up visits in early pregnancy to assess their symptoms.

While we measured various factors that could influence nausea—including hormone levels like hCG and DAO—our findings showed that the chewing gum did not effectively reduce nausea symptoms compared to the placebo or no treatment. Specifically, the vitamin C gum was not associated with any significant alleviation of nausea or vomiting.

Interestingly, we found that elevated levels of hCG were linked to increased nausea severity. In contrast, higher levels of DAO appeared to have a protective effect against symptoms. Additionally, elevated thyroxine and pyridoxine levels correlated with worsened nausea.

Overall, while vitamin C is often highlighted for its health benefits, our results suggest it does not play a significant role in treating nausea during pregnancy. This study highlights the complexities behind nausea in pregnancy, indicating that further research is necessary to uncover effective treatment options.
7.5
Relieved nausea concerns
Most Useful Review
I received my order promptly; the packaging was high-quality and everything intact. The capsules are a bit large but easy to swallow with a citrus taste. I've been taking one capsule daily with meals and have noticed significant benefits. Previously, I struggled with headaches, nausea, and fatigue, but now I feel energised, headaches have ceased, and my mood is excellent. This supplement is ideal for those interested in sports or diets.

Gastritis details

SCIENTIFIC SCORE
Possibly Effective
Based on 12 Researches
7.7
USERS' SCORE
Moderately Good
Based on 5 Reviews
7.3
We aimed to discover how vitamin C supplementation affects oxidative stress in individuals diagnosed with chronic gastritis. In this study, we looked at 244 Japanese patients suffering from atrophic gastritis. They were randomly assigned to receive either 50 mg or 500 mg of vitamin C every day for five years.

After analyzing the results, we found notable differences between the two groups. The high-dose group experienced a significant decrease in reactive oxygen species (ROS), suggesting that vitamin C may help reduce oxidative stress associated with chronic gastritis. In contrast, the low-dose group reported an increase in ROS levels. These findings prompt further interest in how vitamin C can protect against oxidative stress in similar conditions.

Overall, our study supports the idea that higher doses of vitamin C could have a beneficial effect on oxidative stress, particularly in those dealing with gastritis. This insight opens avenues for considering vitamin C as a potential supportive treatment for managing oxidative stress-related issues in digestive health.
7.5
Gentle on stomach
Most Useful Review
4 people found this helpful
Small pills that are easy to swallow and gentle on the stomach. I have gastritis, and they didn't cause any discomfort for me.

Ulcer details

SCIENTIFIC SCORE
Moderately Effective
Based on 10 Researches
8.1
USERS' SCORE
Medium or Average
Based on 6 Reviews
6.1
We conducted a double-blind trial involving sixteen individuals with chronic foot ulcers to see how vitamin C impacts their healing. Half of the participants received 500 mg of vitamin C, while the others got a placebo.

After eight weeks, those taking vitamin C showed significant improvement—ulcer healing was much better compared to the placebo group. Notably, everyone who received vitamin C healed without needing amputation, while 44% of the control group did not see any healing.

Our findings suggest vitamin C may be a beneficial treatment for chronic foot ulcers, given its accessibility and low cost.
9
Healed oral ulcers
Most Useful Review
This product boasts high quality and purity, especially compared to other, more expensive vitamin C options. After reading the reviews, I found it cost-effective and suitable. I purchased it because of my oral ulcers, and I found that it helped them heal within just two days. I will definitely repurchase it in the future.
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