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.
Metabolism. Vitamin B-12 plays a role in metabolism, along with the other B vitamins. The vitamin helps your body convert food to energy, breaking carbohydrates down into more simple sugars. B vitamins also help your body digest proteins and fats. This helps your body use the food you eat more efficiently as fuel.