Carnitine is a nutrient that transports fatty acids from the blood to the mitochondria for energy production in cells. If you want to use fat as fuel for energy production, you need carnitine. Excessive lactic acid concentration has a negative impact on athletic performance, and carnitine consumption helps improve endurance by preventing the accumulation of lactic acid. L-carnitine has been shown to reduce the accumulation of metabolic products of exercise, thereby improving performance, fat burning, and faster recovery. Dorian Yates L-Carnitine XL: It helps reduce fatigue and exhaustion, burn fat and maintain a normal energy-producing metabolism. Helps improve endurance by preventing lactic acid buildup. Dosage: Take one serving (25ml) 30 minutes before exercise.