In other words: A Permutation is an ordered Combination. There are basically two types of permutation: 1  Repetition is Allowed: such as the lock above. It could be 333.  No Repetition: for example the first three people in a running race. You can't be first and second.
For this reason, the idea that collagen supplementation can be an effective treatment for joint pain, osteoarthritis, or any other condition, is highly implausible, if not impossible in principle.
Here are 7 tips for buying the best quality, most effective collagen beauty supplement that will benefit your skin, and help visibly reduce fine lines and wrinkles. 1. TYPE OF COLLAGEN. There are 28 types of collagen in the body. Type 1 Collagen is the most abundant in our body and stronger than steel by weight. It makes up 80% of the dermis layer of our skin. Hence, Type I collagen is considered to be the key building matrix protein which gives our skin its structure and firmness.