Acetyl-L-Carnitine with Biosint™ supports brain function and cognition by enhancing the production of the neurotransmitter acetylcholine. It also promotes energy production in the mitochondria and supports fat metabolism. Gluten Free, Non-GMO What is Doctor’s Best Acetyl L-Carnitine? Acetyl-L-Carnitine is a naturally occurring form of L-Carnitine which is synthesized in the body from the amino acids lysine and methionine. It supports cognitive function and healthy brain neuron function. Acetyl-L-Carnitine plays a key role in the production of acetylcholine, an important neurotransmitter for brain and nerve cell function. It helps supply the brain with energy by increasing mitochondrial efficiency, supports nerve growth factor production and helps to uphold the integrity of intracellular membranes. Doctor’s Best Acetyl-L-Carnitine contains Biosint™ Acetyl-L-Carnitine, which is manufactured in Italy by the reputable company Sigma-Tau with a patented, FDAapproved process. How does it work? Acetyl-L-Carnitine serves as a transport molecule for “active acetate,” which is a source of fuel for metabolic processes that take place in cells. Acetyl-L-Carnitine carries active acetate (the “Acetyl” portion) directly into the mitochondrion, the cell’s energy generating structure. Active acetate is used to produce cellular energy in the form of ATP. Unlike L-carnitine, Acetyl-L-Carnitine readily crosses the blood-brain barrier, where it has specific benefits for brain neurons.