狠狠撸

bitot鈥檚 spots treatment and prevention hypervitaminosis rda follicular hyperkeratosis conjunctiva keratomalacia xerosis cornea night blindness vitamin a deficiency metabolism of vitamin a relative potency retinoic acid retinal retinol fat soluble vitamin vitamin a fatty liver fatty acid oxidation cellular metabolism alcohol metabolism citric acid cycle glycolysis etc atp reducing agent oxidizing agent nad role nad nadh coenzyme educational awareness psychosocial factors maternal helath balanced diet low cost diet high cost diet malnutrition minerals vitamins preschool children nutritional requirement