L-carnitine is a very important substance which is used by your body to help burn fat and to make energy. L-carnitine has been shown to decrease blood pressure in some individuals. L-carnitine also has the additional benefits of promoting weight loss and improving mental function. Additionally, L-carnitine has been shown to normalize thyroid hormone production so it is helpful in cases of hyper and hypothyroidism. L-carnitine has also been shown to increase sperm motility!