L-Carnitine is a compound naturally occurring in all foods, but significant amounts are only found in dark meats (due to high concentration of mitochondria). Approximately 20 mg/day of carnitine is synthesized in the human body (kidney and liver) from methionine and lysine, requiring other cofactor nutrients such as iron and vitamins C, B3 and B6. Many metabolic states may require more than this synthesized amount. Carnitine supplementation may be especially necessary for vegetarian diets or when dark meats are consumed in small amounts, because neither preformed carnitine nor its precursor amino acids are ingested in adequate amounts to support optimal health.
Carnitine supplementation in the amount of 1-6 g/day was shown to provide metabolic support for the following:
• Many metabolic states that require an enhanced oxidation of fat, such as: excess body fat, high riglycerides, sustained exercise (aerobic or resistance training), low carbohydrate/high fat diets
• A variety of conditions that require an intensive support of the heart muscle and the immune system cells
• Other conditions such as: ADHD, pregnancy, infant nutrition, low sperm motility, chronic fatigue, Raynaud’s syndrome, dialysis complications
• Side effects from: interferon therapy for Hepatitis C, HIV anti-virals or chemotherapy