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 tartrate supplementation in the fight against infectious disease L Carnitine: Benefits, Side Effects, And Dosage, Per Dietitians All You Need To Know About L Carnitine HealthKart Carnitine Supplementation in Chronic Hemodialysis PatientsA Literature Review