My tests and comments in a British national newspaper triggered this to occur. https://www.sciencedirect.com/science/article/abs/pii/S09600...

I know a reasonable amount about vitamin D to say the least and I dont agree with all the experts. For example when discussing food cravings related to vitamin D, a PhD expert and studying vit d suggested it was folates due to the solar irradiance exposure.

UV destroys folates in the body.

I wasnt so sure then and I'm still not so sure this is the sole answer. I think what I told them was correct and I've since seen studies from the 1950's which would back up my assertion.

In fact when considering folates create formaldehyde which is cancerous, is the reduction in cancer seen with higher levels of Vit D due to obtaining Vit D from sunshine?

Or is sufficient vitamin D highly correlated with eating a balanced diet and engaging in exercise outside?

Most of vitamin D in your body is synthesized from cholesterol and the extra boost you get from sun exposure is by UVB breaking cholesterol into D3. This mechanism occurs naturally with or without sun’s help.