Injectable L Carnitine How It Works & What to Expect? L Carnitine Linus Pauling Institute Oregon State University L Carnitine Better Through Biology L Carnitine Oral Bioavailability NOW l Carnitine Supplement 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. Comparison of short term and long term effects of peroral L carnitine intake: clinical implications of elevated TMAO levels in cardiovascular complications