How to Live Longer and Feel Better Author:Linus Pauling How to Live Longer and Feel Better shows how vitamins work, and how to make them work for you. For example, in addition to its many functions, vitamin C is responsible for producing and maintaining the body's supply of collagen - the "glue" that virtually holds the human body together. Without collagen our skeletal and muscular systems disintegr... more »ate. With even a depleted supply of this vital substance, skin loses its elasticity and makes us look much older than we actually are.« less