L-carnitine is a carrier for transporting fatty acids, which can promote fat transformation, but it can't make you thin if you eat it, and it won't have any effect if you don't cooperate with exercise itself. L-carnitine is like the width and number of lanes, and the amount of exercise is the number and load of passing cars. L-carnitine is very effective for people who do a lot of exercise but lack L-carnitine in their bodies, and the lack of exercise is equivalent to the width of the driveway but it is useless to run without a car.