Acetyl L-carnitine (ALCAR) is considered more absorbable than straight L-carnitine, especially in the brain. L-carnitine is an amino acid by-product that's required to ferry fat into cells, where the fat is then oxidized, or burned. ALCAR has been shown to increase oxidative capacity in muscle and to promote more efficient muscle glycogen storage. Those improved processes should increase muscle efficiency.
Scientists from the University of Michigan tested the effects of ALCAR in the muscles of lab rats. They wanted to observe any effects of supplemental ALCAR on muscle force and maximum sustained power. They gave the rats varying doses of ALCAR (five, 30, 75 and 500 milligrams per kilogram of bodyweight) in water for 12 weeks. The five-milligram dose is considered the normal physiological intake and was used to compare the effects of the larger doses of ALCAR.
The wet muscle weight was highest after the maximum dose of ALCAR'500 milligrams'however, muscle force and power were lower with any doses higher than five milligrams, although the decrease wasn't considered significant. The maximum sustained muscle force was higher with the highest dose of ALCAR, but, again, that wasn't considered significant. As a result, the researchers concluded that 'ALCAR causes little enhancement of contractile function over the dose range of five to 100 milligrams per kilogram of bodyweight daily. IM