PDF) Effects of oral L carnitine supplementation on insulin sensitivity indices in response to glucose feeding in lean and overweight obese males Nutrient Tip Tuesday: Meet the Fat Burning Powerhouse: L Carnitine This essential nutrient acts as a shuttle, transporting fatty acids directly into your mitochondria to be burned for ATP (energy). Essentially, it helps your Benefits of L Carnitine for PCOS: Improve Insulin Resistance & Weight Loss Metabolites as regulators of insulin sensitivity and metabolism Nature Reviews Molecular Cell Biology Peptide improves glucose and insulin sensitivity, lowers weight in mice