l-citrulline malate

an amino acid binded to malic acid which is something found in green apples citrulline is found in watermelon. For bodybuilders citrulline is mostly for getting a good pump on the muscle since it causes vasodilation by expanding the arteries and increasing blood flow. It enhances protein muscle synthesis it also enhances nitric oxide content. It is also a very good antioxidant as it it cleans up the Uric cycle by removing lactic acid and ammonia. On a side note it does enhance libido and is known to assist with dementia. It is also proven to lower blood pressure.