Gelatin is a protein, one that’s derived from a very interesting material called collagen. If you were to think of an animal’s body like a machine, where the bones and joints are the moving parts and the muscles are the motors, collagen is the rope and cabling that connects it all together. In fact collagen molecules are constructed very much like rope: three long protein molecules (individually known as gelatins) woven around each other to form a tight triple-helix. They’re very strong, the perfect material for making things like tendons and other so-called “connective” tissues.