Vitamin D from supplements isn't anywhere near as good as getting actual sun exposure because you get a combination of both D3 release mediated by UVB exposure

Vitamin D from supplements isn't anywhere near as good as getting actual sun exposure because you get a combination of both D3 release mediated by UVB exposure in addition to NO release mediated by UVA. The fact is that unless you're on the express train to Rickets town, it's probably the NO that's most beneficial as it reduces blood pressure and improves cardiovascular outcomes. Before you go all in on the supplements (a) get measured for vitamin D levels first and (b) if you're anywhere in the ballpark of replete (you probably are) then make an effort to get outside, often, and without sunscreen. To the extent you don't get burned of course.