1. The definition and function of low-weight milk powder. Low-weight milk powder is a kind of milk powder specially designed for babies with low birth weight. Its formula contains more protein, minerals and vitamins to meet the physical development needs of low-weight babies. . Low-weight milk powder can help low-weight infants gain weight quickly and promote physical development. 2. Applicable population Low-weight milk powder is suitable for babies whose birth weight is less than 2500 grams, or who are born after birth.