Vitamin D Revisited
New research shows that vitamin D may help sustain muscle mass, but we also once more need to talk about vitamin D supplementation in general.
New research shows that vitamin D may help sustain muscle mass, but we also once more need to talk about vitamin D supplementation in general.
With winter and short days with little sunlight upon us, the supplement industry is busy telling us we need to supplement vitamin D or run the risk of dire consequences. But what does vitamin D do and how much of it do you really need?