L Carnitine: Benefits, Uses, and Side Effects Lifespan Research Institute 120 1000 mg acetyl L carnitine per daily dose; Increase energy and stamina during physical activity; Supports mental function, improving concentration and memory; Ideal for Acetyl L Carnitine 500 mg L Carnitine Protocol for Life Balance Acetyl L Carnitin Kapseln 500mg VitaminExpress Shop Acetyl l carnitine protects neuronal function from alcohol induced oxidative damage in the brain ScienceDirect 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.