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 Evaluation of L Carnitine Potential in Improvement of Male Fertility Testosterone cheat sheet ( Individual needs may vary.) TESTOSTERONE CHEAT SHEET Boron 6 10 mg day L carnitine 2 g day Zinc 15 30 mg day Copper 1 2 mg day Manganese 1 2 mg day Does L Carnitine Increase Testosterone? Evidence Based Review of Its E Herbolab 2 L Carnitine 3000 Liquid The protective effect of L carnitine on testosterone synthesis pathway, and spermatogenesis in monosodium glutamate induced rats BMC Complementary Medicine and Therapies Springer Nature Link