Immunity
Zinc for Colds: Does It Work, Which Form and How Much
What the trials show about zinc and cold duration, which forms and doses make sense, who is at risk of deficiency, and why high doses threaten copper status and smell.
6 min read
#deficiency
3 articles
Supplements
Vitamin B12: Who Needs It, Deficiency Signs, How to Take It
Who actually needs vitamin B12, how to spot deficiency by symptoms and tests (B12, homocysteine, MMA), and which forms and doses to choose. A guide for vegans and at-risk groups.
10 min read
Supplements
Vitamin D: Doses, Blood Levels and Who Actually Needs It
How to read a 25(OH)D result, which doses work for prevention and for correcting deficiency, who should be tested, and where the overdose risk begins.
10 min read