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.
Vitamins don't supply us with energy. We need protein, carbohydrates, and fats for that. What vitamins do is to help the carbohydrates, fats, and proteins release energy. These vital compounds are very important and they are required for all sorts of complex chemical reactions in our bodies.s most people get older, they tend to eat less due to a loss of appetite. As a result, many elderly individuals do not take in adequate amounts of vitamins and other nutrients as they did when they were younger.