Vitamin A plays an essential role in the function of retina and is essential for growh and differentiation of epithelial tissue. Vitamin B: Plays a role in the synthesis and maintenance of coenzyme A. Necessary for lipid metabolism, carbohydrate metabolism, tissue respiration, glycogenolysis, inhibition of very low-density lipoprotein (VLDL) synthesis. May increaase chylomicron triglyceride removal from plasma. Vitamin B12 (cyanocobalamin): Required for the maintenance of normal erthropoiesis, nucleprotein and myelin synthesis, cell reproduction and normal growth; intrinsic factor, a glycoprotein secreted by the gastric mucosa, is required for active absorption of Vitamin B12 from the GI tract. Necessary for normal...