What is the beneficial dose of L Carnitine (L Carnitine) for Autism Spectrum Disorder (ASD)? L Carnitine Linus Pauling Institute Oregon State University Carnitine Deficiency: What Is It, Causes, Symptoms, and More Osmosis Levocarnitine Oral Solution USP (1g per 10mLmulti dose) Levocarnitine Tablets (330 mg) Levocarnitine Oral Solution (1 g 10 mL multiple unit container) Levocarnitine Oral Solution (Sugar Free) (1 g 10 mL multiple unit container) For oral use only. Not for parenteral use.