Most babies are ready to start weaning, meaning the introduction of solid foods alongside breast milk or formula, at around 6 months of age. The American Academy of Pediatrics recommends beginning complementary foods at approximately 6 months, and most experts agree that starting before 4 months is too early because a young infant’s digestive system and motor skills aren’t developed enough to handle solids safely.
That said, the exact right moment varies from baby to baby. Age is one piece of the puzzle, but your child’s physical development matters just as much.
Why 6 Months Is the Target
Several things converge around the 6-month mark that make it the right window. First, babies are born with a store of iron they received during pregnancy, and that supply runs low between 4 and 6 months. Breast milk alone doesn’t contain enough iron to keep up with a growing infant’s needs, which is one reason the AAP recommends breastfed babies receive an iron supplement starting at 4 months if they aren’t yet eating iron-rich foods.
Second, a protective reflex called the tongue-thrust (or extrusion) reflex starts to fade around 6 months. This reflex causes babies to push their tongue forward automatically, which helps prevent choking during nursing but makes it impossible to swallow solid food. Once it disappears, a baby can move food from the front of the tongue to the back and swallow it. Most children lose this reflex completely by age 4, but it fades enough for safe eating well before that.
Third, starting solids before 6 months shortens the window of exclusive breastfeeding, which carries its own benefits. Research has also linked early introduction of solids to a higher chance of childhood overweight. A Johns Hopkins study found that introducing solid foods before 6 months alters the population of gut bacteria in ways that may contribute to that weight gain over time. Earlier introduction has also been associated with increased risk of eczema, food allergies, and asthma.
Signs Your Baby Is Ready
Rather than circling a date on the calendar, watch for these physical milestones:
- Head and neck control. Your baby can hold their head steady and upright.
- Sitting with support. They can sit up alone or with minimal help, keeping their trunk stable enough to swallow safely.
- Interest in food. They watch you eat, reach for your plate, or open their mouth when food comes near.
- Loss of the tongue-thrust reflex. When you place a small amount of food on their lips, they swallow it instead of pushing it back out onto their chin.
- Grasping ability. They can pick up small objects and bring them to their mouth.
- Hunger between feedings. They seem unsatisfied even after a full milk feeding.
Most babies hit these milestones somewhere between 4 and 6 months. If your baby shows all of these signs before 6 months, some pediatricians will give the green light to start. Before 4 months, though, the digestive and motor systems simply aren’t mature enough regardless of how eager a baby appears.
Spoon-Feeding vs. Baby-Led Weaning
There are two main approaches to introducing solids: traditional spoon-feeding with purees, and baby-led weaning (BLW), where babies feed themselves soft finger foods from the start. Many families use a combination of both.
Parents often worry that baby-led weaning increases choking risk, but the data is reassuring. In a study of over 1,000 infants published in Frontiers in Pediatrics, actual choking occurred at similar rates in both groups: 5.4% of spoon-fed babies versus 6.9% of BLW babies. The number needing medical attention was nearly identical (less than 0.5% in each group). BLW babies did gag and spit food out more often, which can look alarming but is a normal protective response, not the same as choking.
One advantage of baby-led weaning is self-regulation. In the same study, 93% of BLW babies decided for themselves how much to eat, compared to about 85% of spoon-fed babies. Letting a baby control their own intake may help them learn to eat according to hunger rather than external cues. On the other hand, spoon-feeding purees can make it easier to ensure a baby gets iron-rich foods early on, which matters for nutrition at this stage.
What to Introduce First
There’s no single required “first food.” Iron-rich options like pureed meat, iron-fortified infant cereal, or mashed beans are good early choices because they address the nutritional gap that opens around 6 months. After that, fruits, vegetables, and grains can be introduced in any order. Single-ingredient foods are helpful at first so you can spot any reactions.
Current guidelines from the AAP recommend introducing major allergens, including peanut and egg, at around 4 to 6 months, regardless of whether your baby has a family history of allergies. This is a significant shift from older advice that suggested delaying these foods. Early introduction has been shown to reduce the risk of developing food allergies. For peanut, this means a thin peanut butter mixed into a puree or cereal (never whole peanuts, which are a choking hazard).
Foods to Avoid Before 12 Months
- Honey can contain spores that cause infant botulism, a serious form of food poisoning.
- Cow’s milk as a drink has too many proteins and minerals for a baby’s kidneys, can cause intestinal bleeding, and doesn’t provide the right balance of nutrients. (Small amounts cooked into food are generally fine.)
- Fruit and vegetable juice offers sugar without meaningful nutrition and is not recommended before age 1.
How Milk Feeds Change During Weaning
Weaning doesn’t mean dropping breast milk or formula overnight. For the first few weeks, solids are more about practice than nutrition. Your baby might eat only a teaspoon or two at a time, and breast milk or formula remains the primary source of calories and nutrients through most of the first year.
A gradual approach works best. Start by replacing one milk feeding per day with a solid meal, then slowly increase over weeks or months. If you’re breastfeeding, this slow pace also helps your body adjust its milk supply without discomfort. By around 9 to 12 months, many babies are eating three small meals a day with milk feeds filling in the gaps.
Reading Your Baby’s Hunger and Fullness Cues
Babies communicate clearly about hunger and fullness long before they can talk. Between 6 and 23 months, a baby who is done eating will push food away, close their mouth when more is offered, turn their head, or use hand motions and sounds to signal they’ve had enough. Younger infants, still primarily on milk, show fullness by closing their mouth, turning away from the breast or bottle, and relaxing their hands.
Respecting these cues is one of the most important things you can do during weaning. Pressuring a baby to finish a portion teaches them to override their own satiety signals, which can set up unhealthy eating patterns that persist into childhood. If your baby turns away after two bites, that’s a complete meal for now. Their appetite will grow as their body does.