"Food before one is just for fun" — half true, half risky

You've probably heard the cheerful rhyme: "food before one is just for fun." It's meant to reassure parents that breastmilk or formula is the main event in the first year, so there's no need to stress if a baby waves away the mashed carrots. That part is comforting and mostly true — milk remains the primary source of calories. But taken literally, the saying quietly skips over one nutrient that is anything but optional: iron.

Babies are born with a store of iron they inherit in the womb, and around 6 months that reserve starts to run low. Breastmilk is a beautiful food, but it's naturally low in iron, so from about half a year, solids stop being purely recreational — they become the main way a baby tops up iron for a rapidly growing brain and blood supply. Low iron in infancy is linked to lasting effects on attention and development, which is why pediatric guidelines treat first foods as nutrition, not just practice.

The fix is refreshingly practical: offer iron-rich foods early and often once solids begin — think puréed or soft meats, lentils and beans, tofu, and iron-fortified infant cereals. Pairing them with vitamin C foods (a little fruit or tomato) helps the body absorb the iron. So keep the low-pressure spirit of the rhyme — appetites will bounce around — but treat those first iron-rich bites as the point, not the punchline.