Back in the 1960s, it was fairly common for doctors to tell moms to use baby formula instead of breast milk. Their thinking was that formula was scientifically designed for infants. It was proven to provide all the calories and nutrients a baby needed. Fast-forward to today. We know that most infant formulas do, in fact, meet babies’ nutritional needs and are safe to use. But we also know a lot more about breast milk than we used to.