4.3 Complementary Feeding and Weaning Nutrition

Complementary Feeding and Weaning Nutrition

Quick Answer: Start complementary foods at around 6 months, guided by developmental readiness, while continuing to breastfeed to at least 1-2 years. Make first foods iron-rich (iron-fortified cereal, pureed meat, beans), because the infant's iron needs are rising. Introduce allergenic foods like peanut and egg early — from around 6 months — and keep them in the diet, since current evidence (the LEAP trial) shows this lowers food-allergy risk. Feed responsively: follow hunger and fullness cues, never force.

Complementary feeding is the bridge from exclusive milk to family foods. The IBCLC role is to time it well, protect the breastfeeding relationship, and steer parents toward nutrient-dense, allergy-smart first foods.

Timing: Around 6 Months, Not Before 4

The guidance is to introduce complementary foods at around 6 months of age while breastfeeding continues. Two boundaries matter: starting before 4 months is discouraged (the gut and oral-motor skills are not ready, and early solids displace milk), and delaying well past 6 months risks nutrient gaps — particularly iron and zinc — and may make texture acceptance harder. "Complementary" is the operative word: foods complement, not replace, breastfeeding through the first year.

Signs of Developmental Readiness

Readiness is judged by the infant, not just the calendar. Look for this cluster:

1. Good head and trunk control and the ability to sit with support.
2. Loss of the tongue-thrust (extrusion) reflex, so food is not automatically pushed back out.
3. Brings hands and objects to the mouth and can move food to the back of the mouth to swallow.
4. Shows interest in food — watching, reaching, opening the mouth when offered.

Most infants reach this cluster around 6 months. Skills for pureed foods may emerge slightly earlier, but the full set rarely aligns before about 4 months, which is one reason the floor is set there.

First Foods: Lead with Iron

Because fetal iron stores decline and milk is low in iron, first foods should emphasize iron:

There is no required order of fruits before vegetables or any "one new food every 4 days" rule for typical infants; the priority is iron density and a variety of textures and flavors, with continued breastfeeding for the rest of nutrition. Avoid added salt, added sugar, honey (botulism risk before 12 months), and choking hazards (whole nuts, grapes, hard chunks).

Allergen Introduction: Early and Sustained

Old advice to delay allergenic foods has been reversed. Current evidence — anchored by the Learning Early About Peanut (LEAP) trial — shows that early, sustained introduction of allergenic foods such as peanut and egg from around 6 months (in age-appropriate forms, never whole nuts) reduces the risk of developing those allergies. LEAP found markedly lower peanut allergy at age 5 in high-risk infants introduced early versus those who avoided peanut.

The 2023 WHO complementary-feeding guideline likewise supports introducing peanut and egg from the start of complementary feeding. Practical rules: introduce one new allergen at a time when the infant is well, keep it in the diet regularly thereafter, and seek medical advice first for an infant with severe eczema or a known food allergy.

Responsive Feeding

Responsive feeding means recognizing and following the infant's hunger and satiety cues — offering when the infant signals readiness and stopping when they turn away, close their mouth, or lose interest. Never force-feed or pressure to "finish the bowl." Responsive feeding supports healthy appetite self-regulation and a positive relationship with food, and it pairs naturally with breastfeeding, which is itself infant-led.

Nutrition During Gradual Weaning

Weaning is the gradual replacement of breastfeeds by other foods; the full process typically unfolds over months. The exam-favored approach is gradual, partial, and child-led where possible: drop one feed at a time to let supply down-regulate comfortably and reduce engorgement/mastitis risk.

Nutritionally, as breastfeeds decrease, ensure the diet supplies the energy and nutrients milk was providing — continuing iron-rich foods, healthy fats, and, after 12 months, whole cow's milk or a suitable alternative. Breastfeeding remains a meaningful nutritional and immunological contribution well into the second year, so there is no nutritional mandate to wean at 12 months.

Example: A parent of a 6-month-old with mild eczema asks how to start solids "safely," worried about peanut allergy. The IBCLC confirms readiness signs (sits supported, no tongue-thrust, reaches for food), advises iron-rich first foods, and — counter to the parent's instinct — recommends introducing smooth peanut (e.g., thinned peanut butter) and egg early and keeping them in the diet, since early sustained exposure lowers allergy risk (LEAP). For significant eczema, she suggests checking with the pediatrician first. Breastfeeding continues throughout.