Supplement Facts
Serving Size: 1 Veggie Capsule
Amount Per Serving
%DV
Vitamin C (as Q®-C ascorbic acid)
1000 mg
1111%
The product is found useful for the following medical conditions
Celiac details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 2 Reviews
8.6
9
Boosts immunity
Most Useful Review
Doctor's Best Vitamin C uses Quali-C from Scotland, renowned for its quality. Each tablet contains 1,000mg of Vitamin C that is effectively absorbed. This supplement enhances the immune system and antioxidant capacity, especially beneficial during colds or fatigue. It also aids collagen production, promoting healthy skin and joints. The veggie capsules are gentle on the stomach, making them easy to take, even on an empty stomach. Moreover, they are gluten-free, non-GMO and vegan, perfect for the health-conscious. With 120 tablets, it's high quality and offers excellent value for money, making it a vital supplement for daily health maintenance.
Updated: Apr 2025
Acne details
SCIENTIFIC SCORE
Possibly Effective
Based on 18 Researches
7.1
USERS' SCORE
Good
Based on 8 Reviews
8.5
9
We explored the potential of sodium ascorbyl phosphate (SAP), a stable form of vitamin C, in preventing and treating acne vulgaris. The study included a time-kill analysis showing that a 1% SAP formulation reduced the harmful bacteria Propionibacterium acnes by a significant log reduction of 5 after 8 hours. This demonstrates the strong antimicrobial properties of SAP against acne-causing bacteria.
Additionally, we observed an in vivo study with 20 participants, where the SAP formulation effectively prevented up to 40% of UVA-induced sebum oxidation, suggesting it can help reduce inflammation associated with acne. In another open-label study involving 60 volunteers over 12 weeks, a 5% SAP lotion was rated as excellent or good in effectiveness by 76.9% of the participants, outperforming a commonly prescribed acne treatment.
Overall, our findings indicate that sodium ascorbyl phosphate could serve as an effective, non-antibiotic option for both the prevention and treatment of acne, making it an attractive addition to cosmetic products due to its lack of side effects.
Additionally, we observed an in vivo study with 20 participants, where the SAP formulation effectively prevented up to 40% of UVA-induced sebum oxidation, suggesting it can help reduce inflammation associated with acne. In another open-label study involving 60 volunteers over 12 weeks, a 5% SAP lotion was rated as excellent or good in effectiveness by 76.9% of the participants, outperforming a commonly prescribed acne treatment.
Overall, our findings indicate that sodium ascorbyl phosphate could serve as an effective, non-antibiotic option for both the prevention and treatment of acne, making it an attractive addition to cosmetic products due to its lack of side effects.
9
Solved acne issues
Most Useful Review
58 people found this helpful
I didn’t realise my acne was due to vitamin C deficiency. After starting supplements, my acne problem was solved—my skin is clean with no major breakouts.
Updated: Apr 2026
Cough details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 2 Reviews
8.5
10
Cough returned
Most Useful Review
3 people found this helpful
This vitamin C made a significant difference for me. I believe I had a mild case of pneumonia. After a week of taking it, my awful cough disappeared. However, while out of town and forgetting my vitamins, I purchased another brand, and my cough is returning.
Adenoiditis details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 11 Reviews
8.4
9
Improves recovery
Most Useful Review
3 people found this helpful
I began taking this after being infected with coronavirus and rarely catch colds now. When I do have a sore throat, I use propolis spray and find the symptoms disappear in less than two days. I feel my skin is brightening as well.
Updated: Apr 2025
Headache details
SCIENTIFIC SCORE
Possibly Effective
Based on 3 Researches
7.7
USERS' SCORE
Good
Based on 6 Reviews
8.4
8
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.
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
Cold symptoms relieved
Most Useful Review
7 people found this helpful
Very good quality! I prefer this bottle of vitamin C as it doesn’t upset my stomach, unlike other brands. When I switched back to this, my cold symptoms disappeared quickly, including sore throat and headache, although increasing the dose may help during pain episodes. The quality is outstanding, and I recommend it to everyone.
Updated: Apr 2026
Knee Pain details
SCIENTIFIC SCORE
Possibly Effective
Based on 15 Researches
7.1
USERS' SCORE
Good
Based on 3 Reviews
8.4
9
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.
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.
9
Reduced knee pain
Most Useful Review
4 people found this helpful
My favourite vitamin C. While there are cheaper options, I prefer this one. It has no side effects, and I take it with Omega, Vitamin S, and MSM to support my knees due to arthritis. It helps, especially after training, as I no longer experience knee pain. When I have a cold, I double the dosage to recover faster.
Updated: Apr 2026
Autoimmune Disorder details
SCIENTIFIC SCORE
Moderately Effective
Based on 11 Researches
8
USERS' SCORE
Good
Based on 2 Reviews
8.3
9
We investigated how vitamin C, also known as ascorbic acid, might impact autoimmune disorders like rheumatoid arthritis. Through a study involving a mouse model of collagen-induced arthritis, we administered vitamin C or a placebo solution and observed the effects on the immune response and disease progression.
Notably, the research showed that mice given vitamin C experienced a significant delay in the onset of arthritis and a reduction in disease severity. This suggests that vitamin C can play a critical role in managing autoimmune conditions by minimizing the production of autoantibodies, which are harmful antibodies that mistakenly attack the body's tissues.
Our findings revealed that vitamin C reduced the number of plasma cells and decreased antibody production in response to immunization. This indicates that vitamin C influences the immune system's response at a cellular level, helping to prevent the emergence of autoreactive plasma cells. We also discovered that the mechanism behind this effect involved inhibiting the Stat3 signaling pathway, leading to less activation of autoreactive immune components.
Ultimately, these results highlight the potential of vitamin C not just as a nutrient, but as a strategic tool in managing autoimmune disorders. By simply supplementing with vitamin C, there may be a way to intervene positively in the progression of diseases like rheumatoid arthritis.
Notably, the research showed that mice given vitamin C experienced a significant delay in the onset of arthritis and a reduction in disease severity. This suggests that vitamin C can play a critical role in managing autoimmune conditions by minimizing the production of autoantibodies, which are harmful antibodies that mistakenly attack the body's tissues.
Our findings revealed that vitamin C reduced the number of plasma cells and decreased antibody production in response to immunization. This indicates that vitamin C influences the immune system's response at a cellular level, helping to prevent the emergence of autoreactive plasma cells. We also discovered that the mechanism behind this effect involved inhibiting the Stat3 signaling pathway, leading to less activation of autoreactive immune components.
Ultimately, these results highlight the potential of vitamin C not just as a nutrient, but as a strategic tool in managing autoimmune disorders. By simply supplementing with vitamin C, there may be a way to intervene positively in the progression of diseases like rheumatoid arthritis.
7.5
Supports overall health
Most Useful Review
2 people found this helpful
It helps, especially in these challenging times, to remain healthy. I take a dosage of 500 mg for prevention and 1000 mg when I feel I need support to avoid illness. Highly recommend.
Updated: Mar 2026
Chest Pain details
SCIENTIFIC SCORE
Moderately Effective
Based on 13 Researches
8.3
USERS' SCORE
Good
Based on 3 Reviews
8.3
9
We explored the effects of vitamin C on chest pain in chronic smokers experiencing endothelial dysfunction. In our study, 31 patients, who were undergoing diagnostic catheterization without significant coronary artery issues, participated in a controlled trial. They were given either an IV infusion of 3 grams of ascorbic acid (vitamin C) or a placebo saline solution before undergoing a cold pressor test to assess their coronary artery response.
The results were telling. Smokers typically showed a decrease in luminal area—an indicator of blood flow—during the cold pressor test. However, after infusing vitamin C, this response shifted positively, demonstrating improved blood flow through a vasodilation effect. On the other hand, those who received the placebo did not experience significant changes.
This means that for chronic smokers, acute administration of vitamin C appears to enhance the function of the endothelium, which is vital for proper blood vessel health and managing chest pain. Ultimately, we observed that vitamin C may help prevent the inactivation of nitric oxide, a compound that supports healthy blood flow, and this effect could be crucial for managing cardiovascular health in smokers.
The results were telling. Smokers typically showed a decrease in luminal area—an indicator of blood flow—during the cold pressor test. However, after infusing vitamin C, this response shifted positively, demonstrating improved blood flow through a vasodilation effect. On the other hand, those who received the placebo did not experience significant changes.
This means that for chronic smokers, acute administration of vitamin C appears to enhance the function of the endothelium, which is vital for proper blood vessel health and managing chest pain. Ultimately, we observed that vitamin C may help prevent the inactivation of nitric oxide, a compound that supports healthy blood flow, and this effect could be crucial for managing cardiovascular health in smokers.
7.5
Pain management improvement
Most Useful Review
2 people found this helpful
My doctor advised that taking a high dose of vitamin C could alleviate my chest pain during menstruation. After taking it for six months, I noticed improvements by the third month. Although I still rely on painkillers, magnesium and calcium therapy has significantly helped me.
Updated: Apr 2025
Chronic Cough details
SCIENTIFIC SCORE
Possibly Effective
Based on 2 Researches
7
USERS' SCORE
Good
Based on 2 Reviews
8.3
7
Dietary vitamin C reduces smoking-related cough
A survey of 4,300 young Norwegian adults examined whether dietary vitamin C intake relates to respiratory symptoms like cough and wheeze. Researchers estimated vitamin C consumption through questions about orange juice, oranges, potatoes, carrots, and tomatoes over the past year.
Among current smokers, those consuming more dietary vitamin C (395+ mg/week versus under 209 mg/week) showed reduced odds of morning cough and chronic cough. The protective effect was even stronger for ex-smokers experiencing wheeze. These benefits held true even after excluding people taking vitamin C supplements, suggesting the effect comes from food sources themselves.
The findings suggest that vitamin C's antioxidant properties may help counteract oxidative stress caused by smoking, potentially easing respiratory symptoms in smokers specifically.
Among current smokers, those consuming more dietary vitamin C (395+ mg/week versus under 209 mg/week) showed reduced odds of morning cough and chronic cough. The protective effect was even stronger for ex-smokers experiencing wheeze. These benefits held true even after excluding people taking vitamin C supplements, suggesting the effect comes from food sources themselves.
The findings suggest that vitamin C's antioxidant properties may help counteract oxidative stress caused by smoking, potentially easing respiratory symptoms in smokers specifically.
7.5
Helps sinus congestion
Most Useful Review
These help with my chronic sinus congestion! I take one daily and prefer the time-released version to avoid vitamin overload.
Updated: Apr 2026
Cold Sores details
SCIENTIFIC SCORE
Moderately Effective
Based on 3 Researches
8.3
USERS' SCORE
Good
Based on 3 Reviews
8.3
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.
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
Reduced cold incidences
Most Useful Review
I often fell ill, usually once a month. However, since incorporating vitamin C into my daily routine, I’ve been unwell less frequently—perhaps once every two or three months. Any signs of a sore throat or fever have subsided after taking my daily dose. This is my second bottle, and I have no intention of stopping!
Updated: Apr 2025
Common Cold details
SCIENTIFIC SCORE
Possibly Effective
Based on 7 Researches
7.4
USERS' SCORE
Good
Based on 55 Reviews
8.3
8
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.
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
Effective for colds
Most Useful Review
9 people found this helpful
The best vitamin C I've ever used! Slow absorption, but since taking one per day, I feel healthy. When I caught a common cold, I took three every six hours and felt better the next day. Great value for money.
Updated: Apr 2025
Flu details
SCIENTIFIC SCORE
Possibly Effective
Based on 8 Researches
7.5
USERS' SCORE
Good
Based on 48 Reviews
8.3
8
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.
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
Staying well
Most Useful Review
17 people found this helpful
Love, love it, love it! I highly recommend this brand of vitamin C. It absorbs well and you feel the difference immediately. Not only did it help me recover from the flu, but it's also helping me stay well. Remarkably, I've noticed my stomach is flatter than before, which I was sceptical about. Now I am a true believer and will continue using this daily.
Updated: Mar 2026
Sore Throat details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 9 Reviews
8.3
8.5
Cold symptoms relief
Most Useful Review
7 people found this helpful
I find this bottle of vitamin C very good! The quality is excellent and it doesn't upset my stomach, unlike other brands. It rapidly alleviates my cold symptoms, including sore throat and headaches, especially when I increase the dosage during pain. I definitely recommend it to everyone!
Updated: Apr 2025
Back Pain details
SCIENTIFIC SCORE
Questionable
Based on 4 Researches
5.3
USERS' SCORE
Good
Based on 6 Reviews
8.2
4
We conducted a year-long study to investigate the effects of vitamin C on postoperative pain and recovery after a specific type of spine surgery known as posterior lumbar interbody fusion (PLIF). In this randomized, placebo-controlled trial, we worked with 123 patients, dividing them into two groups: one receiving vitamin C and the other a placebo.
Our main focus was to see how vitamin C influenced lower back pain measured by a visual analogue scale. While we found that there was no significant difference in pain levels at the one-year mark between the two groups, there was a silver lining. We observed that vitamin C appeared to enhance functional improvement, especially within the first three months after surgery.
So, while vitamin C didn’t seem to directly reduce pain intensity after surgery, it could play a role in supporting early recovery and everyday function. This finding may encourage further exploration into vitamin C's potential benefits in postoperative care for patients undergoing spine surgeries.
Our main focus was to see how vitamin C influenced lower back pain measured by a visual analogue scale. While we found that there was no significant difference in pain levels at the one-year mark between the two groups, there was a silver lining. We observed that vitamin C appeared to enhance functional improvement, especially within the first three months after surgery.
So, while vitamin C didn’t seem to directly reduce pain intensity after surgery, it could play a role in supporting early recovery and everyday function. This finding may encourage further exploration into vitamin C's potential benefits in postoperative care for patients undergoing spine surgeries.
9
Joint pain relief
Most Useful Review
I've found this product excellent for my joints; I can now climb stairs without my knees screaming in pain. Moreover, I haven't had flu symptoms since I began the supplement.
Updated: Apr 2025
Bacterial Infection details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 5 Reviews
8.2
9
Significant help
Most Useful Review
Helping significantly in combating a chronic bacterial infection. I take 6000mg a day. Thank you, Raymund Edwards!
Updated: Apr 2025
Bone Pain details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 8 Reviews
8.2
9
Viral load reduction
Most Useful Review
I usually need 2-3 1000mg doses of vitamin C for effect, but this product is potent enough that one dose eases my bone pain and lessens my cold symptoms. It's gentle on my stomach and has a good packaging.
Updated: Apr 2025
Pelvic Pain details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 7 Reviews
8.2
9
Flu pain reduction
Most Useful Review
2 people found this helpful
This excellent vitamin C, taken alongside iron during flu seasons, significantly eases my pain. It's become an essential part of my routine due to its ongoing benefits.
Updated: Apr 2025
Adrenal Gland Disorder details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 5 Reviews
8.1
7.5
Helps adrenal fatigue
Most Useful Review
8 people found this helpful
Good form of vitamin C helping with adrenal fatigue and skin.
Updated: Apr 2025
Cold details
SCIENTIFIC SCORE
Moderately Effective
Based on 2 Researches
8
USERS' SCORE
Good
Based on 171 Reviews
8.1
7
Effectiveness of Vitamin C on Colds
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.
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
Avoided catching colds
Most Useful Review
30 people found this helpful
Our best defence against the cold season. The quality of these vitamins has been verified for me. My children brought home bad colds from school, yet my husband and I avoided catching it despite being their designated nose wipers. My mother caught a cold despite the precautions. I now swear by these vitamins and the additional variety of Dr. Best vitamins I take daily.
Updated: Apr 2025
Allergies details
SCIENTIFIC SCORE
Moderately Effective
Based on 1 Research
8
USERS' SCORE
Good
Based on 11 Reviews
8
8
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.
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.
8
Vital for wellbeing
Most Useful Review
5 people found this helpful
Essential for the body! This supplement is crucial for managing allergies, preventing flu, and supporting gum health and collagen formation. I feel I cannot be without it; when I'm out, I experience noticeable repercussions. It's important never to miss a dose, as the body becomes accustomed to it, and abruptly stopping can lead to a sudden scurvy situation. What I appreciate most is its non-GMO formulation.
Updated: Apr 2026
Chronic Fatigue Syndrome details
SCIENTIFIC SCORE
Possibly Effective
Based on 5 Researches
7
USERS' SCORE
Good
Based on 20 Reviews
8
7
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.
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 health effects
Most Useful Review
9 people found this helpful
I've been taking more than 6,000 won of vitamin C daily for my vascular health, and after a consistent intake for half a year, my chronic fatigue syndrome has improved. I'm satisfied with the packaging and effectiveness, as it significantly enhances my immunity.
Updated: Mar 2026
Constipation details
SCIENTIFIC SCORE
Moderately Effective
Based on 1 Research
8
USERS' SCORE
Moderately Good
Based on 7 Reviews
7.8
8
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.
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
Constipation relief
Most Useful Review
2 people found this helpful
I find that MSM genuinely helps relieve constipation.
Updated: Apr 2025
Cancer details
SCIENTIFIC SCORE
Likely Very Effective
Based on 1 Research
9
USERS' SCORE
Moderately Good
Based on 8 Reviews
7.5
9
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.
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.
7
Supportive treatment
Most Useful Review
6 people found this helpful
I take high doses of Vitamin C daily, using the powdered form mixed with L-Lysine. I purchased this for when I am out all day or travelling. For those who find the sour taste of ascorbic acid unpleasant, capsule form is also available. This Vitamin C is excellent, as I select products that are mostly clean and free from fillers and additives. Your support in assisting my natural healing from Cancer is greatly appreciated. Thank you!
Updated: Apr 2026
Heartburn details
SCIENTIFIC SCORE
Moderately Effective
Based on 1 Research
8
USERS' SCORE
Medium or Average
Based on 20 Reviews
6.7
8
Vitamin C reduces heartburn symptoms
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.
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 experienced
Most Useful Review
Everyone enjoyed their meals as if we were dining as a family. I take one pill daily after eating along with other nutritional supplements, and I did not experience any heartburn.
Updated: Mar 2026
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