Collagen is a type of protein responsible for keeping skin firm and smooth. It is found in everyone's skin, but it does decrease with age, which often leads to loose skin and wrinkles. Fortunately, various collagen products can help gain some of it back so that the skin can keep as much elasticity as possible no matter your age. Alas, not all products on the market are equal. You can locate the best kinds by finding out the types available, their ingredients, and where to find them.There are a few main types of collagen products available. For example, many celebrities use collagen injections, which is when this product is inserted under the skin in order to fill in wrinkles and fine lines. This strategy is usually only used by those with lots of money because it typically costs hundreds of dollars per session, and several sessions are typically required to get results that last more than a year. Instead, most consumers purchase collagen cream, which is meant to be massaged into the skin in order to add elasticity over time. This is usually the cheapest option, but not all such collagen products actually work.