Source Naturals L-Lysine L-Proline, 275 mg, 120 TabletsSource Naturals L Proline L Lysine provides 275 mg of LLysine and LProline per tablet, with 120 tablets per bottle. LLysine is one of the nine essential amino acids that the body cannot synthesize. It is a fundamental component for carnitine synthesis. LProline, although producible by the body, may not be adequately synthesized in low protein or vegetarian diets. LLysine and LProline serve as precursors to hydroxylysine (HL) and hydroxyproline (HP),