When did my breast milk suddenly become less nutritious than formula? When I read a policy statement from the American Academy of Pediatrics stating that exclusively breastfed babies need to be supplemented with iron starting at 4 months, I have to wonder… Are they saying that my perfect nutrition for my baby is no longer PERFECT? Are they saying that what my body produces is suddenly SUB PAR? This caused me to do a little research. What IS the deal with iron in breast milk? Does my 4 month old really need those nasty-tasting drops?