acetyl l carnitine (150 capsules, 75 day supply) 1,000mg alcar for brain function support, memory, attention, and stamina - made and tested in the usa by double wood supplements double wood supplements acetyl l-carnitine (alcar) is a mitochondrial support supplement that promotes healthy mood, learning, and memory. it can also support mitochondria in your muscles which promote exercise endurance and gym performance. there is evidence that l-carnitine may hold many other benefits. it can help support blood circulation and nutrient rich blood flow after a high fat meal. carnitine is also needed to metabolize fat and supplementing may support the process of fat metabolism to fatty acids. it can also support muscle recovery so you can hit the gym more quickly after a brutal workout. double wood's acetyl l carnitine is manufactured and tested for safety right here in the usa.