L-Carnitine is a naturally occurring compound in the body that plays a key role in transporting fatty acids for energy production and is commonly used as a dietary supplement. Only the L-form is biologically active and is known for its anti-osteoporotic, antioxidant, and heart-protective benefits. Clinical studies show that supplementing with L-carnitine increases muscle carnitine levels, enhances exercise performance, and reduces reliance on glycogen during physical activity. It also supports vascular health by modestly improving post-meal blood vessel function. In animal studies, L-carnitine has been shown to increase bone mineral density and reduce bone breakdown. Additionally, it lowers markers of exercise-induced oxidative stress and helps improve outcomes in cardiovascular conditions, including reducing arrhythmias, angina symptoms, and mortality following myocardial infarction.
