Amazon.com: Doctors Best Acetyl L Carnitine 1000 mg Per Serving Acetyl L Carnitine Supplement for Men & Women, Supports Brain & Nerve Cell Function, Mental Focus, Helps Generate Cellular Energy 60 Veg Acetyl L Carnitine, 120 Veggie Caps (500 mg per Cap) Multi Collagen Protein (Types I, II, III, V, X), 2000 mg (per serving) Most people have never heard the term mitochondrial dysfunctionbut they feel the symptoms every day. Your mitochondria are responsible for producing the energy that powers every process in your bodyfrom your brain