Red: Regular Gelatin. Gelatin powder is simply cooked collagen, reduced to a pure protein powder. This is the same type of protein youâll see when you make homemade bone brothâif you get enough collagen-rich bones and other parts in there, the broth will gel in the fridge.Thatâs the gelatin working.elatin powder is simply cooked collagen, reduced to a pure protein powder. This is the same type of protein youâll see when you make homemade bone brothâif you get enough collagen-rich bones and other parts in there, the broth will gel in the fridge.