Strong evidencemineral
Selenium for Frequent Colds
Selenoproteins enhance immune cell function and antibody production. Glutathione peroxidase reduces oxidative stress during infection.
How strong is the research?
Strong evidence
Based on a meta-analysis of multiple studies — the highest level of research evidence.
Research source
SourceHoffmann PR et al. · Journal of Nutrition 2019How much to take
55–100 mcg
Upper limit 400 mcg/day. Take with vitamin E for enhanced antioxidant activity.
When to take it
Best taken: with food