Acetyl L-Carnitine’s main role in your body involves mitochondrial function and energy production. In cells, it helps transport fatty acids into the mitochondria, where they can be burned for energy. About 98% of your Carnitine stores are contained in your muscles. Acetyl-L-Carnitine is possibly the most effective form of Carnitine as it crosses the blood-brain barrier more easily and in doing so it helps to promote synthesis of a primary neurotransmitter in the brain called acetylcholine. Acetylcholine’s primary role is to allow for communication between nerve cells. By boosting acetylcholine synthesis, Acetyl L-Carnitine plays an essential role in supporting memory health, focus, alertness and even improved sleep. Vegetarians and vegans may want to consider Acetyl L-Carnitine supplements as their diets may preclude them from naturally obtaining sufficient Acetyl L-Carnitine. Older adults also benefit from Acetyl L-Carnitine supplements as research shows that your levels drastically decline as you age.