Amazon.com : InClover Kidney Bladder and Urinary Health Supplement for Dogs & Cats with Resveratrol (Found in Cranberries), L Carnitine & D Mannose Supports a Healthy Urinary Tract and Optimal Renal 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 NKF KDOQI Guidelines Holistic Approach to Kidney Health: Integrative Medicine Insights Efficacy of L carnitine supplementation for improving lean body mass and physical function in patients on hemodialysis: a randomized controlled trial European Journal of Clinical Nutrition History of L carnitine: Implications for renal disease Journal of Renal Nutrition