Sun exposure can positively affect Vitamin D levels even with sunscreen or physical barriers.

“even if you wear sunscreen or a physical barrier okay this is interesting even if you wear sunscreen or a physical barrier when you get outside into the sun it can still have a positive effect on your vitamin D levels this was surprising to me but then of course it makes sense sunlight is full spectrum light it's not just UV and short wavelength light the ability for longer wavelength light to penetrate the skin is clear and those longer wavelengths can also impart a positive influence on the vitamin D pathway”