L Carnitine in the Treatment of Psychiatric and Neurological Manifestations: A Systematic Review L Carnitine Functional roles of taurine, L theanine, L citrulline, and betaine during heat stress in poultry Journal of Animal Science and Biotechnology Springer Nature Link L Carnitine injection is recommended at 1 ampule every 2 3 days for best results. The L Carnitine is taken intravenously either by normal injection or using a butterfly needle. After taking this L Carnitine, you Both taurine and L carnitine play roles in muscle function, and their combination could potentially enhance muscle health, recovery and weight management. Dr. Thacker breaks down the differences of taurine and L carnitine in L Taurine Health Benefits and Uses of L Taurine Xtendlife