alt Hacker NewsI believe presenting vitamin D supplements as effective in treating depression is kinda misleading. It's rather vitamin D deficiency that is super effective at making you miserable, but it's not the only thing that can do it to you. And since a lot of us are in fact deficient (and the threshold of being categorized as deficient may be placed too low too), it will appear as being quite effective overall, especially compared to other drugs that act on less common and poorly understood causes.
Thank you. Fixing a vitamin deficiency is an obvious benefit to physical health. But does it "cure depression"? To the extent that your depression was caused by vitamin deficiency, sure. But then didn't you just cure a vitamin deficiency? I'm sure a lot of things starting improving once your body starts getting proper nutrients after years of neglect! That doesn't indicate causality.