Comment by legulere

If you're not in the respective fields it can be pretty difficult to distinguish good from bad research. I am not able to do so.

If you (or your close ones) don't suffer from depression, then I guess it's best to ignore it until scientific consensus has formed. That will for sure show up on wikipedia. As far as I can see as a layperson there is a lot of correlation with Vitamin D that breaks down in interventions and Vitamin D is recommended mostly for babies and elderly people. On the other hand I see Vitamin D pushed as a miracle drug not unlike Vitamin C used to some decades ago and regular reports of overdosing of supplements leading to organ failure.

If you're suffering from depression, you should talk to your doctor. They will be able to help you to weigh potential benefits with risks