[andai]

>These rebels argue that what made the people with high vitamin D levels so healthy was not the vitamin itself. That was just a marker. Their vitamin D levels were high because they were getting plenty of exposure to the thing that was really responsible for their good health—that big orange ball shining down from above.

Yeah, it's not just UV. Infrared light has beneficial effects on deep tissue, including the brain. There's no way to get that from a pill.