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 Summary of studies on oral L carnitine treatment in end stage renal Download Scientific Diagram Carnitine & carnosine: anti Alzheimer's duo Work for human longevity L carnitine Tablet, Non prescription, Treatment: Health Supplements at 1000 box in Kalol L carnitine is a naturally occurring amino acid structure that is made in the human brain, liver, and kidneys. L carnitine plays a critical role in energy production, as it converts fat into energy.