L Carnitine: Benefits, Side Effects, And Dosage, Per Dietitians Losing weight with L carnitine supplements. Yes or no? L Histidine 750mg Warnke Vitastoffe 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. PDF) Comparison of pharmacokinetics of L carnitine, Acetyl L carnitine and Propionyl Lcarnitine after single oral administration of L carnitine in healthy volunteers