Collagen is a structural protein found in cartilage, bone, tendons, ligaments, and muscle, essential for transferring force from muscle to tendons.

“collagen is a protein uh that is very I mean it's pretty prevalent in your body because it's the it's the main protein that is uh used for uh structural uh protein it's a structural protein so collagen is in your cartilage your bone your tendons your ligaments um and all of that and it's also in muscle very small amount relatively in order to and it's important to transfer the force of your connect of your muscle towards your tendons so even in the muscle all of your contracto proteins need to be uh linked to collagen in order or connective tissue proteins in order to transfer the force”