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 come in pill and liquid form, and because collagen is found in your skin, bones and cartilage, you can combine it with other supplements. Collagen supplements may be mixed with glucosamine or chondroitin, two supplements used for joint and arthritis problems.