Potential Adverse Effects of L Carnitine Marnys If you are like a lot of people, you may have never heard of carnitine but this important nutrient is critical for our body's ability to optimally burn fat required for energy. Carnitine transport and fatty acid oxidation ScienceDirect L Carnitine: Benefits, side effects, and dosage Role of carnitine in disease Nutrition & Metabolism 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