I went to get my Vit D levels tested this week. I am brown skinned. I walk at about 12pm everyday for 30mins around a canyon behind my workplace and also supplement with the Now Brand 5000IU Vit D3.
After 7 months of supplementation my number is 41!!
Before that I took 3 months of weekly Vitamin D2 and it raised my Vit D levels from 13 to 51.
Should I bump it up to 10000IUs. By the way I live in San Diego..I wonder why I am so deficient!!