I have written about the positive affects of vitamin D in previous posts
so hopefully you are supplementing… but with what? If you have talked to me in my office in downtown San Francisco then you know I suggest D3.
A clinical trial demonstrated that supplementation with vitamin D3 was significantly more efficient at raising serum blood levels of the vitamin than vitamin D2.
Vitamin D refers to two biologically inactive precursors. Vitamin D3, known as cholecalciferol, and vitamin D2, known as ergocalciferol are transformed in the liver and kidneys into 25- hydroxyvitamin D (25(OH)D), the non-active ‘storage’ form, and 1,25-dihydroxyvitamin D (1,25(OH)2D), the biologically active form that is tightly controlled by the body.