Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Vitamin C (ascorbic acid) has been investigated for its role in supporting the respiratory system, particularly in the context of respiratory infections such as the common cold and, more recently, COVID-19. Vitamin C is essential for the normal functioning of the immune system, and it acts as an antioxidant, helping to protect cells from oxidative stress, which is heightened during infections and inflammation in the respiratory tract. Historically, vitamin C became popular for preventing and treating the common cold in the 1970s, largely due to advocacy by Linus Pauling. Since then, numerous randomized controlled trials and meta-analyses have examined its effectiveness. According to a 2013 Cochrane review, regular vitamin C supplementation does not significantly reduce the incidence of colds in the general population, but it may reduce the duration and severity of respiratory symptoms. Some evidence also suggests that those under physical stress (e.g., athletes, soldiers) may benefit more from supplementation. In cases of severe respiratory infections, such as pneumonia, vitamin C levels in the blood are often depleted, and supplementation may help improve outcomes, although this evidence is less robust and sometimes conflicting. Overall, vitamin C is scientifically validated as supportive for certain aspects of respiratory health, particularly in reducing the severity and duration of mild infections, but it is not a cure or universally preventative measure.

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Other body systems supported by vitamin C

Products containing vitamin C

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Vitabase Active Woman's Multi
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Metagenics Wellness Essentials Women's Daily Packs
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Pure Encapsulations Women's Nutrients
Pure Encapsulations Women's Nutrients
Designs For Health Women's Twice Daily Essential Packets