How quickly can vitamin d deficiency be corrected with vitamins?

See below: Vitamin D deficiency may affect 40-60% of Americans, perhaps due to sunblock usage. Best to get a basic OH-Vit D level to assess if you are truly deficient. Since it is fat soluble, it may take weeks to months to arrive at a stable blood level. In chronic neurological disease, we shoot for maximal levels between 50-70 ng/ml. Higher levels may create kidney issues.

For most Americans : Contrary to popular belief and practitioners of medicine selling vitamins, most Americans have no Vitamin D deficiency, with the possible exception of strict vegetarians, pregnant women, unusual diets and proven lack of D. Save your money spent on D and other vitamins, and buy a gym membership. The only proven benefits come from a healthy diet and regular exercise.