it depends on so many things that we probably dont fully understand though. Each blood test I get i'm within range (pretty much right in the middle) for everyt

it depends on so many things that we probably dont fully understand though. Each blood test I get i'm within range (pretty much right in the middle) for everything. I take zero supplements. I eat a variety of things over the course of the week, always somewhat balanced (i eat more veggies than the average american i'd say and perhaps way more fruits). I exercise, with a shirt on (lol). Sometimes for many hours, sometimes for 30min. Totals hours over the course of the week. I take zero supplements normally. I see these as an option or for specific cases rather than "the daily pill" (in fact, the "daily pill" things scare me a bit, I'd rather not rely on pills - the science don't seem clear enough and the things you can buy are definitely unclear) Every now and then i crave specific things like orange juice (ie high vitamin C contents). All that to say best way to know is probably to test, but also, if you go bike 20min shirtless every 3 days and walk 20min a day I assume you don't get nearly as much vitamin D as I do, so it kinda makes sense to me. But still depends on the person, how much sun, yada yada.