The choice to breastfeed is a personal decision and this decision can be influenced by many factors. Breastfeeding is strongly recommended by many health care providers. The following is a brief description of breastfeeding. Breastfeeding is good for both mother and baby. For infants, breast milk is the most ideal nutrition for infants, providing an almost perfect supply of vitamins, proteins and fats. Breast milk is the most easily absorbed for infants. Breast milk contains antibodies that help infants fight infections including viral and bacterial infections. Breastfeeding can reduce the risk of asthma and allergies in infants. Evidence shows that infants who are exclusively breastfed for 6 months have lower rates of otitis media, appealing tract infections and diarrhea, as well as fewer hospitalizations and doctor visits. Breastfeeding also enhances parent-child bonding, combats obesity, and allows babies to grow up healthy. It has also been shown that breastfeeding reduces sudden infant death syndrome (SIDS). It has also been documented that breastfeeding leads to higher IQ in infants, especially in premature babies. Breastfeeding is also beneficial to the mother, helping her to regain normal weight. It is also well documented that breastfeeding mothers can reduce the risk of breast and ovarian cancer, as well as reduce osteoporosis in mothers after menopause. Most experts recommend exclusive breastfeeding for 6 months, and then breastfeeding with supplements until 1 year of age. Even if your breast milk cannot meet this need, breastfeeding for a short period of time can be beneficial. The Centers for Disease Control and Prevention (CDC) states that you should not breastfeed if you have more than one of the following conditions: ① the baby has galactosemia (a rare genetic disorder); ② the mother has HIV, active tuberculosis, syphilis, malaria, but positive for hepatitis C and B is allowed to breastfeed; ③ the mother is on oral antiretroviral drugs, chemotherapy and radiation therapy; ④ the mother uses drugs such as marijuana, cocaine, etc. ④ The mother uses drugs such as marijuana and cocaine. 400 IU of vitamin D should be added a few days after the start of breastfeeding, and if breast milk is insufficient after 4 months, iron-containing formula can be added. It is not necessary to sterilize the nipple and pacifier. When breastfeeding, it is not necessary to add additional water if the amount is sufficient. Mothers who work often need to express milk beforehand. Human milk can be stored at room temperature for 4-10 hours, refrigerated for 4-8 days, or frozen for 3-6 months, but it should not be frozen again if thawed. Honey should not be eaten within 1 year of age because it can contain small amounts of Clostridium botulinum budding cells, which can cause infection in infants whose immunity is not yet sound. In addition this budding cell is very resistant to heat, so heating itself does not reduce the risk, but commercially available processed food for infants, even with honey, is safe for infants because it has been adequately heated and treated. Regarding milk, it is not recommended for infants under 1 year of age. The reason is that milk lacks sufficient iron, vitamin E and essential fatty acids, while infants are less likely to digest the proteins in milk, and the sodium and potassium in milk are high. Regarding soy milk, it is not recommended even if it is organic. Soy milk contains certain enzymes that affect the infant’s absorption of nutrients, especially phytohormones, which affect the infant’s formal development.