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.
Nutrients for L-carnitine Production. Niacin, vitamin B-6 and iron increase metabolism by assisting with the production of L-carnitine, an amino acid that promotes fat burning, notes Vanderbilt University.Your body synthesizes L-carnitine from the essential amino acids lysine and methionine in the liver.utrients for L-carnitine Production. Niacin, vitamin B-6 and iron increase metabolism by assisting with the production of L-carnitine, an amino acid that promotes fat burning, notes Vanderbilt University.