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.
Each B Vitamin has a specific function within the metabolic process. Vitamin B1 - Vitamin B1 is also known as Thiamine. Thiamine is essential in healthy brain function and as well as metabolism of carbohydrates. Thiamine deficiencies can cause a disease called Beriberi, which is a disease of the nerve and heart.