Protein in your food is made up of amino acids. These are the building blocks that make up the structure and function of every one of your organs and tissues.
Collagen has the densest concentration of amino acids for connective tissue health.
Collagen tissues benefit greatly from proline, glycine and two peptides found nowhere other than in foods that contain collagen: hydroxyproline and hydroxylysine.
The constitutive building blocks in collagen that support your connective tissues are glycine, proline, and hydroxyproline, along with a few other amino acids. Almost 40% of tendon is glycine alone. When you take a look at the amino acid differences between different protein sources, you will see that the best source of glycine is collagen protein.
Arginine plays a role in immune regulation of the post-exercise inflammatory process that leads to regeneration and healing.
Having enough of the right proteins contributes to making hormones like serotonin and melatonin, being able to regenerate your muscles and your joints and bones, and supporting your immune function, among literally thousands of other functions