Joint bundling is a subcategory of pure bundling in which the two products are offered together for one bundled price; Leader bundling is a subcategory of pure bundling in which a leader product is offered for discount if purchased with a non-leader product, accessory or other item.
Vitamin B Helps Your Metabolism. You should balance your vitamin supplements to match your needs. A multi-vitamin is great, but if you are extremely fatigued all the time and don't get enough vitamin B in your diet, then adding vitamin B-12 will improve your flagging energy. B-complex vitamins provide you with: 1  Boosted metabolism. 2  Healthy skin.
Meet the B Vitamins: Thiamin, riboflavin, niacin, biotin, pantothenic acid, pyridoxine, folic acid and cobalamin. Vitamins are substances necessary for growth. The B vitamins work together and have related roles in the body including their involvement in the metabolism of carbohydrate, fat and protein and energy production.