vitamin d structure in the blood flow – ball and stick isometric view 3d

cholecalciferol ergocalciferol vitamin d2 d3 fat-soluble secosteroids calcium magnesium phosphate epidermis uvb light sun exposure absorbed cofactor antibody production butter margarine water-soluble cheese cream milk eggs sunlight yogurt skin cancer bone marrow enzyme hydroxylation calcitriol nuclear receptor calcifediol immune system kidneys circulation remodeling bone flow flowing pro-hormone calcium homeostasis micrograph obesity metabolism rickets osteomalacia cell respiration ultraviolet irradiation protein sedentary vdr blood levels