1 L Carnitine This amino acid plays a crucial role in fat metabolism and has been shown to support testosterone levels by improving androgen receptor activity. It also enhances muscle recovery and L Carnitine Attenuates Testicular Dysfunction in Type 1 Diabetes Mellitus Via Modulation of Oxidative Stress, Inflammation, and miRNA Expression Inflammation Springer Nature Link L Carnitine Tartrate Supplementation for 5 Weeks Improves Exercise Recovery in Men and Women: A Randomized, Double Blind, Placebo Controlled Trial Frontiers Exogenous L carnitine Administration Ameliorates the Adverse Effects of Heat Stress on Testicular Hemodynamics, Echotexture, and Total Antioxidant Capacity in Rams