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.
Collagen supplements benefit and side effects, dosage and type. December 17 2015 by Ray Sahelian, M.D. Collagen is a fibrous protein found in vertebrates, the major element of skin, bone, tendon, cartilage, blood vessels and teeth. It forms insoluble fibers of high tensile strength and which contains the unusual amino acids hyroxyproline and hydroxylysine.