About one third of all of the protein in your body is collagen. Collagen is a major structural protein, forming molecular cables that strengthen the tendons and vast, resilient sheets that support the skin and internal organs. Bones and teeth are made by adding mineral crystals to collagen.
User-generated content. User-generated content (UGC), alternatively known as user-created content (UCC), is any form of content created by users of a system or service and made available publicly on that system.
A precursor to user-generated content uploaded on YouTube was America's Funniest Home Videos. Motivation for creating UGC. While the benefit derived from user generated content for the content host is clear, the benefit to the contributor is less direct.