I try to take 10-15,000 IU (of D3 in gel cap) two to three times a week. Yes, it really works in that my blood testing showed the difference. I have seen no sid

I try to take 10-15,000 IU (of D3 in gel cap) two to three times a week. Yes, it really works in that my blood testing showed the difference. I have seen no side effects, but then I was really, really deficient. One side benefit: No more symptoms associated with Seasonal Affective Disorder. YMMV.