5/15/2025
Last update
5/15/2025
Reviewed By
Overview
SCIENTIFIC SCORE
Moderately Effective
Based on 2 Researches
8
USERS' SCORE
Good
Based on 441 Reviews
8.2
Supplement Facts
Serving Size: 1/4 Level Teaspoon (1.1 g)
Amount Per Serving
%DV
Vitamin C (Ascorbic Acid)
1.1 g (1,100 mg)
1222%
Top Medical Research Studies
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.
Read More
9
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.
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
Quick recovery noted
227 people found this helpful
Vitamin C in crystals is a godsend during cold season. I dilute it with raspberry juice and sugar for my children and drink it myself. It tastes lovely! With vitamins D, K-2, and zinc, I now recover in just 3-4 days, compared to the previous 7-10 days. The Vitamin C powder lasts a long time.
Read More
7.5
Gentle on stomach
11 people found this helpful
Good stuff. I purchased the Now fine ascorbic acid powder a few weeks ago. It’s much easier on my stomach compared to the Nutri Biotic crystalline powder. If I ever feel a cold coming on, I take a teaspoon mixed with orange juice. I plan to take one level teaspoon every day, even in summer. I’ve looked into Linus Pauling, who took 14 grams of vitamin C powder every day and lived to 93.
Read More
9
Health improvement noted
10 people found this helpful
Super! After giving birth four months ago, my immunity was low. I drink this vitamin C every morning, and my health has improved, along with the quality of my skin! My children take it at the first sign of a cold, and within 2-3 days, they feel cheerful again. However, be mindful of allergic reactions, as my husband developed some after starting the supplement.
Read More
Medical Researches
SCIENTIFIC SCORE
Moderately Effective
Based on 2 Researches
8
- All Researches
9
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.
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
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.
Read More
User Reviews
USERS' SCORE
Good
Based on 441 Reviews
8.2
- All Reviews
- Positive Reviews
- Negative Reviews
9
Quick recovery noted
227 people found this helpful
Vitamin C in crystals is a godsend during cold season. I dilute it with raspberry juice and sugar for my children and drink it myself. It tastes lovely! With vitamins D, K-2, and zinc, I now recover in just 3-4 days, compared to the previous 7-10 days. The Vitamin C powder lasts a long time.
Read More
7.5
Gentle on stomach
11 people found this helpful
Good stuff. I purchased the Now fine ascorbic acid powder a few weeks ago. It’s much easier on my stomach compared to the Nutri Biotic crystalline powder. If I ever feel a cold coming on, I take a teaspoon mixed with orange juice. I plan to take one level teaspoon every day, even in summer. I’ve looked into Linus Pauling, who took 14 grams of vitamin C powder every day and lived to 93.
Read More
9
Health improvement noted
10 people found this helpful
Super! After giving birth four months ago, my immunity was low. I drink this vitamin C every morning, and my health has improved, along with the quality of my skin! My children take it at the first sign of a cold, and within 2-3 days, they feel cheerful again. However, be mindful of allergic reactions, as my husband developed some after starting the supplement.
Read More
9
Prevents cold
4 people found this helpful
An essential remedy for winter! Each morning, I add a teaspoon to my water and drink it. Remarkably, I haven't caught a single cold, even though I've often felt the onset coming.
Read More
9
Fast cold relief
4 people found this helpful
Ascorbic Acid Powder is taken daily by both my husband and me. It effectively clears runny or stuffy noses and significantly shortens a cold. It's easy to ingest and gets into our systems much faster than tablets. We learned about this from Dr. Michael Savage, who highly endorses it.
Read More
Frequently Asked Questions
10
Immediate cold relief
3 people found this helpful
The finest vitamin C! At the first sign of a cold, a shock dose, and the very next day, not a whisper of illness. I wholeheartedly recommend it.
9
Health improvement noted
10 people found this helpful
Super! After giving birth four months ago, my immunity was low. I drink this vitamin C every morning, and my health has improved, along with the quality of my skin! My children take it at the first sign of a cold, and within 2-3 days, they feel cheerful again. However, be mindful of allergic reactions, as my husband developed some after starting the supplement.
9
Cold relief achieved
1 people found this helpful
At the onset of a cold, I take vitamin C, often combined with Zinc. They work exceptionally well together; I’ve avoided colds this season. Within a day or two, I find no signs of illness. I wholeheartedly recommend this combination!
9
Strengthened immunity
1 people found this helpful
Great Vitamin C has helped me immensely. After giving birth, I was often ill due to a weakened immune system. I ordered vitamin C crystals for easy dosage control. After four months of taking it, I've noticed fewer colds, more energy, and reduced drowsiness.
9
Quick recovery noted
227 people found this helpful
Vitamin C in crystals is a godsend during cold season. I dilute it with raspberry juice and sugar for my children and drink it myself. It tastes lovely! With vitamins D, K-2, and zinc, I now recover in just 3-4 days, compared to the previous 7-10 days. The Vitamin C powder lasts a long time.
9
Cold prevention success
2 people found this helpful
An excellent product! I've used Vitamin C Megadose for two years. I observe its impact; I haven't had a cold in that time, and my persistent fatigue has improved. Quality and ingredients seem sound.
10
Cold-free for years
Thanks to Vitamin C and a complex of other vitamins, I haven’t had a cold in two years.
10
Cold elimination
2 people found this helpful
I add powdered vitamin C to juice, taking it alongside zinc. The cold is gone, and I feel splendid!
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.
References
- Hemilä H, Chalker E. Vitamin C for the common cold and pneumonia. Pol Arch Intern Med. 2025;135. 10.20452/pamw.16926
- Wang X, Ran C, Fu Y, Han L, Yang X, et al. Application of Exogenous Ascorbic Acid Enhances Cold Tolerance in Tomato Seedlings through Molecular and Physiological Responses. Int J Mol Sci. 2024;25. 10.3390/ijms251810093
