Serum L Carnitine Levels Are Associated With First Stroke in Chinese Adults With Hypertension Stroke The adverse effects of long term l carnitine supplementation on liver and kidney function in rats L Liu, D M Zhang, M X Wang, C Y Fan, F Zhou, S J Wang, L D Kong, 2015 Understanding the Benefits and Uses of Carnitine in Health and Fitness Fitness Health High Blood Pressure: Prevention & Treatment Life Extension 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 L Carnitine is Underrated. New Meta Review Reminds Us Why.