Over 90% of your body's energy comes from mitochondria. When they break down, everything else does too. Think: Fatigue that sleep doesn't fix Brain fog and memory issues Slow Full article: Increase in Nitric Oxide and Reductions in Blood Pressure, Protein Kinase C II and Oxidative Stress by L Carnitine: A Study in the Fructose Fed Hypertensive Rat The bright and the dark sides of L carnitine supplementation: a systematic review Journal of the International Society of Sports Nutrition Springer Nature Link Comparison of short term and long term effects of peroral L carnitine intake: clinical implications of elevated TMAO levels in cardiovascular complications