is l-carnitine safe for people with heart l-carnitine, a friend or foe cardiovascular disease? A Mendelian randomization study | BMC Medicine Unleashing the Power of L-Carnitine

A double-blind, placebo-controlled trial in 90 HIV-positive patients with symptomatic distal symmetrical polyneuropathy found no benefit of intramuscular injection with 1 g/day of ALCAR for two weeks in the intention-to-treat analysis, but there was some pain relief in the group of 66 patients who completed the trial (84)

The kidney plays an important role in carnitine recycling by reducing the loss of carnitine through its reabsorption and ensuring the effective utilization of carnitine

Whey (made from milk) naturally contains some L-carnitine, and plant-based sources contain it in small amounts, like nuts, seeds, whole grains, and some fruits and vegetables (like avocados and asparagus)

Age-associated deficit of mitochondrial oxidative phosphorylation in skeletal muscle: role of carnitine and lipoic acid