“L-carnitine is the bioactive form and is a derivative of the amino acid L-lysine. L-carnitine is a conditionally essential nutrient. Under normal conditions our bodies produce enough. However, certain conditions such as irritable bowel syndrome & medication usage can reduce production making this an essential dietary nutrient.” Click Top 3 Anti-Aging Benefits of L-Carnitine – DrJockers.com for the rest of the article.