L Carnitine Liquid vs Capsules: Which Actually Works? Pure Nutrition 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 vs L Arginine: Understanding Their Differences and Benefit Fitness Health Taurine and L Carnitine: The Ultimate Supplement Duo Understanding the Role of Carnitine in TPN and IDPN Therapy