Breastmilk is so incredibly superior to formula that there is just no argument. Except when you are physically unable to, the best choice is always to breastfeed your baby. There are a wealth of benefits to the baby as a result of having been breastfed. The colostrum which is the baby's food for the first few days of life, is a powerful immune-boosting substance. Less allergies, decreased risk of SIDS, and fewer cases of asthma are also benefits derived from being fed breastmilk instead of formula.
Mom also benefits from the breastfeeding relationship.
Nursing after birth helps the uterus to contract, which helps prevent internal bleeding. They also help the new mother to relax. Research has proven that a woman who breastfeeds also has lower risk of breast cancer and ovarian cancer later in life. Formula is just a mix of different ingredients designed to mimic human milk. The problem is, human milk is a living substance, and formula is not.