2 ms·

I have a UV index card I keep in my wallet (for no good reason). If you are receiving a UV index of 3 or higher on your skin, it is sufficient to induce endogen

by YeahNO 4y ago

I have a UV index card I keep in my wallet (for no good reason). If you are receiving a UV index of 3 or higher on your skin, it is sufficient to induce endogenous production of vitamin D.