n=1, but I raised my formerly deficient vit. D levels a lot by supplementing with high doses over the past year. It raised my lab rating to a moderate level. I

n=1, but I raised my formerly deficient vit. D levels a lot by supplementing with high doses over the past year. It raised my lab rating to a moderate level. I haven't had a cold in months (I used to get them several times a year). Could be a coincidence, but I'll give some credit to the supplementation.