Collagen

utside of our cells, collagen is the main structural protein found in the body. ‘It makes up around one third of the body’s whole protein content and is found, not only in skin, but also in tendons, bones, ligaments, muscles and cartilage’ says GP and medical writer, Dr Hannah Short (). ‘In other words, it’s the connective tissue “glue” – holding ligaments, bones and joints together. Some collagens even act as protective coverings for our internal organs,