Doctor's Best Acetyl L-Carnitine is a dietary supplement that supports mental focus and alertness. It contains 1000 mg per serving and comes in a pack of 120 veggie capsules. This product is non-GMO, vegan, and gluten-free. Acetyl L-Carnitine is a naturally occurring form of L-carnitine, a vitamin-like nutrient synthesized in the body from the amino acids lysine and methionine. It helps support cognitive function and brain neuron health by enhancing mitochondrial efficiency, supplying the brain with energy.