Thank you for sharing the calculator. I see there are many external parameters to consider, and variety between people and health status adds to the compexity.
I think it renders the approach to calculate sun expose time unreliable and, probably, useless for most people. Are there other ways? Can I reliably measure my current and required levels of vitamin D, ideally without going to the doctor every week? Or could I just rely on common sense - make sure I spend time outside, but avoid exposing my skin for longer than 30 mins on sunny summer days?
I think it renders the approach to calculate sun expose time unreliable and, probably, useless for most people. Are there other ways? Can I reliably measure my current and required levels of vitamin D, ideally without going to the doctor every week? Or could I just rely on common sense - make sure I spend time outside, but avoid exposing my skin for longer than 30 mins on sunny summer days?