It's interesting that you mention Vitamin C! Do you know many people who take Vitamin C supplements? Did you know that Vitamin C had its own supplementation hyp

It's interesting that you mention Vitamin C! Do you know many people who take Vitamin C supplements? Did you know that Vitamin C had its own supplementation hype cycle in the 70s and 80s? It's out of fashion now, mostly because people understand now that it's not a miracle drug. I suspect the same thing will happen with Vitamin D. TFA isn't saying that you don't need vitamin D, or that it can't be used to treat Ricketts or osteomalacia (which, like scurvy, are relatively rare conditions). It's simply saying that widespread supplementation on people who have normal levels or minor deficiencies isn't supported by the evidence.