Levocarnitine is a drug that promotes fat metabolism to protect the heart and blood vessels. Levocarnitine is a drug that is more commonly used in nephrology, mainly in patients with uremia. There are mitochondria in human cells, and the mitochondria have carnitine on their membranes. The function of this carnitine is to transport the outside blood lipids to the mitochondria for burning, thus achieving the purpose of fat consumption. As soon as the fat is consumed, the damage to the cardiovascular and cerebrovascular vessels will be reduced, which can achieve the purpose of protecting the cardiovascular and cerebrovascular vessels and preventing cardiovascular and cerebrovascular diseases. However, for patients with uremia, they need hemodialysis treatment, and the process of hemodialysis will dialyze out the carnitine, so the cardiovascular and cerebrovascular vessels are not protected, so it is necessary to supplement the exogenous carnitine. And the ingredient of levocarnitine is carnitine. Therefore, for patients on dialysis, levocarnitine needs to be supplemented after each dialysis session.