> vitamin D deficiency is a population health problem (widespread) ...despite the study that got very popular on HN lately this is far from a clearly agreed up

> vitamin D deficiency is a population health problem (widespread) ...despite the study that got very popular on HN lately this is far from a clearly agreed upon theory. There's still only retrospective data and with enough confounding factors to make drawing any inference on the causality of things very very hard. Until we all start wearing blood-analyzing implants for a generation or so, >50% of nutrition related studies will continue either being bullshit or not meaning what we think they mean,