What I found interesting is ``` Correlation analysis showed no substantial relationship between the mean vitamin D levels and the risk of infection in the youn

What I found interesting is ``` Correlation analysis showed no substantial relationship between the mean vitamin D levels and the risk of infection in the younger population (r = −0.16, p = 0.42) or the rate of mortality in the older age group (r = −0.24, p = 0.23). ``` Together with the rest of the issues pointed out here in the comments, I'm sceptical about the value of this study. That said, given that most people should be taking supplements in winter anyways, and that I've seen ZERO warnings about dangers of low-dose supplementation (600 IU/day, not the 3000-6000 some are mentioning here)...