Vitamin D daily amount is super super easy to get, something like 5-15minutes standing outside is all you need.
True it's like 80% of daily vitamin D intake in 15 minutes even when you're only showing like 20% skin.
But sometimes that be harder than you'd think. There's no direct sunlight to my apartment, at any point of the year. Despite these apartment complexes being called "Sun Valley" lol. I supplement vitamin D in the winters though. Have to. I'm not always awake during the few hours the sun is up and even when it is often there's heavy cloud coverage.
If you do supplement vitamin D though, remember to do it in the morning rather than evening, as it's basically an antidote to melatonin, so to avoid fucking up circadian rhythm (or to create a new one) melatonin at night and vitamin d in the morning.