L-carnitine in milk powder is an important nutrient that promotes fat decomposition, metabolism and energy supply in milk powder. L-carnitine can promote the conversion of body fat into energy, and belongs to a kind of amino acid nutrients. L-carnitine in the human body mainly comes from lamb, beef, pork and other red meats, milk powder added in moderation L-carnitine is harmless to the human body, can promote the metabolism and utilization of body fat. Due to the single dietary structure of infants and young children, the main source of diet for a variety of dairy products, the main source of energy for the fat in dairy products, the lack of L-carnitine in the baby’s body, resulting in a decrease in the utilization rate of fat, which is not conducive to the physical development of the baby, adding L-carnitine can increase the baby’s utilization rate of the fat in the milk powder.