SCIENTIFIC SCORE
Moderately Effective
Based on 2 Researches
8
USERS' SCORE
Excellent
Based on 169 Reviews
9.1
Supplement Facts
Serving Size: 1 Vegetarian Tablet
Amount Per Serving
%DV
Vitamin C (as Ester-C® Calcium Ascorbate)
1,000 mg (1 g)
1,111%
Calcium (as Ester-C® Calcium Ascorbate)
110 mg
8%
Citrus Bioflavonoids ComplexCitrus Bioflavonoids (Citrus sinensis) (fruit), Sweet Orange, Tangerine, Lime, Lemon, Acerola, Rutin, Hesperidin Complex (Citrus spp.) (fruit), Naturally Occurring Vitamin C Metabolites
200 mg
**

Top Medical Research Studies

7
Effectiveness of Vitamin C on Colds
Vitamin C for the common cold and pneumonia.
Strong relevance to cold prevention
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.
Read More
9
Vitamin C improves cold tolerance
Application of Exogenous Ascorbic Acid Enhances Cold Tolerance in Tomato Seedlings through Molecular and Physiological Responses.
Directly addresses cold tolerance
We explored the effects of ascorbic acid, commonly known as vitamin C, on cold tolerance in tomato seedlings. In our study, we discovered that applying vitamin C significantly boosts the seedlings' ability to handle cold stress.

By enhancing the antioxidant defense system, vitamin C treatment increased the enzyme activity in the seedlings' leaves. Additionally, it raised levels of important compounds such as proline, sugar, and abscisic acid, all of which play crucial roles in plant stress responses.

Our observations showed that vitamin C also protects the photosynthesis system of tomato seedlings. This implies that it helps maintain chlorophyll function, which is critical for the plant's overall health, especially under cold conditions.

Moreover, we found that vitamin C treatments led to increased expression of genes linked to antioxidant enzymes and cold response mechanisms. Overall, our findings suggest that exogenous vitamin C is a beneficial approach to improve cold tolerance in tomatoes and may provide helpful insights for farmers looking to cultivate hardier varieties during colder months.
Read More

Most Useful Reviews

9.5
Effective cold remedy
A super remedy for colds and Covid. I keep it in my first aid kit for everyone. In the initial days of a cold, I take 1 tablet three times a day for 3-5 days, then reduce the dose to 1 tablet daily for up to 14 days. It helped me cope with the illness.
Read More
9.5
Supports immune system
I frequently use vitamin C during fall and winter. At the first sign of a cold, I take 1 capsule with zinc or elderberry, which often works, and I wake without any signs of illness. It’s suitable during illness too, helping my immune system fight the virus and preventing complications.
Read More
9.5
Rapid cold recovery
I love this product—one of my best purchases! The bioflavonoids ensure better absorption. I take one capsule during a cold or when I feel unwell. It definitely works as colds go away quickly, even sore throats resolve in a day.
Read More

Medical Researches

SCIENTIFIC SCORE
Moderately Effective
Based on 2 Researches
8
  • All Researches
9
Vitamin C improves cold tolerance
Application of Exogenous Ascorbic Acid Enhances Cold Tolerance in Tomato Seedlings through Molecular and Physiological Responses.
Directly addresses cold tolerance
We explored the effects of ascorbic acid, commonly known as vitamin C, on cold tolerance in tomato seedlings. In our study, we discovered that applying vitamin C significantly boosts the seedlings' ability to handle cold stress.

By enhancing the antioxidant defense system, vitamin C treatment increased the enzyme activity in the seedlings' leaves. Additionally, it raised levels of important compounds such as proline, sugar, and abscisic acid, all of which play crucial roles in plant stress responses.

Our observations showed that vitamin C also protects the photosynthesis system of tomato seedlings. This implies that it helps maintain chlorophyll function, which is critical for the plant's overall health, especially under cold conditions.

Moreover, we found that vitamin C treatments led to increased expression of genes linked to antioxidant enzymes and cold response mechanisms. Overall, our findings suggest that exogenous vitamin C is a beneficial approach to improve cold tolerance in tomatoes and may provide helpful insights for farmers looking to cultivate hardier varieties during colder months.
Read More
7
Effectiveness of Vitamin C on Colds
Vitamin C for the common cold and pneumonia.
Strong relevance to cold prevention
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.
Read More

User Reviews

USERS' SCORE
Excellent
Based on 169 Reviews
9.1
  • All Reviews
  • Positive Reviews
  • Negative Reviews
9.5
Effective cold remedy
A super remedy for colds and Covid. I keep it in my first aid kit for everyone. In the initial days of a cold, I take 1 tablet three times a day for 3-5 days, then reduce the dose to 1 tablet daily for up to 14 days. It helped me cope with the illness.
9.5
Supports immune system
I frequently use vitamin C during fall and winter. At the first sign of a cold, I take 1 capsule with zinc or elderberry, which often works, and I wake without any signs of illness. It’s suitable during illness too, helping my immune system fight the virus and preventing complications.
Read More
9.5
Rapid cold recovery
I love this product—one of my best purchases! The bioflavonoids ensure better absorption. I take one capsule during a cold or when I feel unwell. It definitely works as colds go away quickly, even sore throats resolve in a day.
9.5
Strong antioxidant
I’ve used vitamin C for a year, and it works! Recently, I fell ill with ARVI, and my vitamin C ran out at an inopportune moment. It strengthens cell resistance, gives energy, and promotes recovery. When I feel early signs of a cold, I take 1 tablet daily for three days, and all symptoms vanish. Remarkably effective!
Read More
10
Sos remedy for cold
The 500 mg Non-Acidic Vitamin C with bioflavonoids is my go-to remedy at the first sign of a cold. It has a beneficial composition with no irritation to the stomach, and I take two capsules daily during early illness. This vitamin C helps raise my immunity, and I rarely fall ill.

Frequently Asked Questions

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