When to take L carnitine: Dosage, forms, and side effects APT Wellness Liver Detox Supplement with Milk Thistle (Silymarin Extract), L Carnitine & Glutathione Added Multivitamins, Zinc & Amino Acids Natural Liver Cleanse & Fat Metabolism 60 Tablets : Amazon.in: Early research into L carnitine was often cited as underwhelming, showing negligible changes in muscle carnitine content and fat loss outcomes. However, these findings may have been limited by a short study window L Carnitine: Benefits, Side Effects, And Dosage, Per Dietitians