Best is a tricky qualifier, but sunlight is certainly good and probably better than we know…when used appropriately.
We do know a fair amount about the absence of ☀️ and the pathological effects thereof. But studying the benefits of ☀️ absent a disease requires more people to detect smaller measurable differences and hence more $$.
All that said, do try the sun. Let the sun touch you too. Be awake when it’s light and sleep when it’s dark. We were born with a rhythm. Don’t fight it.