The life-extension amino acid. More than any other amino acid supplement, carnitine (l-carnitine) is associated with life-extending properties. Primarily this is the case because carnitine clearly has a positive effect on conditions which often shorten one's life span: heart disease, blood vessel disease, and obesity. Carnitine is an amino acid which has been found to have a wide range of protective effects and health benefits as long as it is consumed in sufficient amounts.

Carnitine's protective effects are associated primarily with heart health. It has been shown to be a factor in the protection against heart disease.

One of a number of health benefits of carnitine is that it aids in fat metabolism. It therefore helps in avoiding obesity, and the many medical complications associated with being overweight.

Carnitine is popular among athletes and body builders as it increases stamina and has been shown to help in increasing muscle mass.