Why do babies who drink breast milk are smarter? A baby’s initial contact after birth is with the person who takes care of him, and the mother’s touch, cuddling and rocking of the baby gives him a natural sense of comfort. This natural comfort has an important impact on the child’s intellectual development and personality formation throughout his life. Intellectual development is influenced by several factors, the material basis of which is a sufficient number of well-developed and functioning brain cells. Nerve cells are characterized by the fact that differentiated cells cannot reproduce. The critical moment of brain development is from 18 weeks of gestational age to 2 weeks of age after birth, and the most critical moment is from 3 months of late pregnancy to 6 months after birth (mainly during breastfeeding); infancy is the fastest period of brain development in the whole childhood, so it is quite important to ensure the nutritional supply during this period, and the most beneficial food for infant brain cell development during this period is breast milk, for the following reasons: 1. The proteins in breast milk are mainly Whey protein, casein, etc., of which whey protein has the highest content and high bioavailability, can ensure the supply of protein needed for the rapid development of nerve cells during infancy, and breast milk contains substances that are beneficial to brain cell development, such as taurine. 2. Breast milk contains immunoglobulins, complement, lysozyme, lactoferrin, etc. These can enhance the infant’s defense ability against diseases, avoid the influence of diseases on the infant’s physical and intellectual development, and ensure the normal development of intelligence. 3, breast milk contains a large amount of unsaturated essential fatty acids, arachidonic acid, eicosanoic acid and other long-chain polyvalent unsaturated fatty acids are higher than cow’s milk, and these are important components of the central nervous system, and have an important role in brain development and nerve myelin formation. Retinal cells are rich in these long-chain polyunsaturated fatty acids, as is the gray matter of the brain, and the high concentration of these unsaturated fatty acids is beneficial to intellectual and visual development. The cholesterol content in breast milk is three to four times higher than cow’s milk and is easily absorbed, which is necessary for the formation of nerve myelin and plays an important role in the developing brain cells. Lactose is the main component of carbohydrates in breast milk, which can ensure the energy supply of brain cells. It can promote the absorption of calcium in the intestine, and the calcium and phosphorus ratio in breast milk is appropriate, which can reduce the occurrence of rickets and its impact on intelligence. 5. The content of copper and chromium in breast milk and the content of zinc in colostrum are richer than cow’s milk. Although the content of iron in breast milk is not high, its absorption and utilization rate can be as high as 50%, so less babies suffer from iron deficiency anemia than those fed with other dairy products, thus avoiding the effect of iron deficiency on intelligence. Zinc is involved in the metabolism of amino acids, proteins and nucleic acids and cell division in the body, which is necessary for the development of infant intelligence, and the high content of zinc in breast milk, especially colostrum, can generally meet the needs of infants. 6, through breastfeeding, the mother can educate the infant, promote the infant’s intellectual development, and the skin contact between mother and child when breastfeeding, eye contact, caressing and language and emotional communication before and after breastfeeding, are conducive to the development of the infant’s sensory perception. So mothers better insist on breastfeeding their babies!