I was just replying to the lazy untrue grandparent comment about this being a single study. I'm glad I don't need to do your research for you. As for the discu

I was just replying to the lazy untrue grandparent comment about this being a single study. I'm glad I don't need to do your research for you. As for the discussion, there are multiple lines of evidence pointing to the fact that sunlight does in fact reduce mortality. First, this study controls for exercise, and also found that use of tanning beds reduces all cause mortality, so overall it's a pretty good study. We also know that vitamin D status is negatively correlated with mortality. We also know that nitric oxide reduces blood pressure, and is released from the skin by sunlight.