Compared with L-Carnitine, Propionyl-L-Carnitine may produce greater increases in cellular L-Carnitine concentrations, possibly by being transported into muscle fibers easier, and it may bolster muscle-cell energy production. Heart tissues may be able to utilise Propionyl-L-Carnitine to stimulate energy production. As well, Propionyl-L-Carnitine widens blood vessels and enhances penile blood flow, resulting in improved erectile function. Overall, Propionyl-L-Carnitine improves overall blood circulation to alleviate muscle cramps.