I was recently told because of our melanin it's harder for the sun's rays to penetrate our skin. Joe Gilles was telling me he is affected too.

I think low on blood test is around mid- hi 20s. I can't get past 6. Been taking D rx (50 k units) for 4 yrs now. Get tested every 3 mos.

That's true as well. Combo of factors but def a generation thing.