The Effect of L Carnitine on Critical Illnesses Such as Traumatic Brain Injury (TBI), Acute Kidney Injury (AKI), and Hyperammonemia (HA) Optima Nova Adult Mobility 2 Kg Comida Para Perros Adultos Optima Nova Mobility 2 Kg Con Glucosamina, Condroitina Y L Carnitina Snacks Kanu Vet Weight Control para perros Kanu Pet L carnitine is a naturally occurring amino acid structure that is made in the human brain, liver, and kidneys. L carnitine plays a critical role in energy production, as it converts fat into energy.