When Should Babies Start Solid Food?
Watch the developmental signs, not the calendar — most babies are ready around 6 months, and never earlier than 4.
Around 6 Months for Most Babies
Mainline public guidance from the NHS, AAP and CDC points to about 6 months, around 180 days, as the usual time to introduce solid food, while breast milk or formula remains the main drink through the first year. Starting a little earlier or a little later is normal, because the deciding standard is a set of developmental signs rather than a date. Some regional guidance describes a 4-to-6-month window, which mainly reflects that a few mature babies show readiness a few weeks before the 6-month mark.
Babies born prematurely or with special developmental circumstances need a timeline of their own. Ask your pediatrician to set the starting point for your baby instead of counting weeks from the calendar.
The Readiness Signs That Matter
Four signs tell you the body is ready. The baby sits upright with little support, holds the head steady, and shows strong interest in your meals — staring, reaching, smacking lips. The tongue-thrust reflex has faded, so a spoon placed in the mouth is no longer pushed straight back out. And the baby can carry food from in front of the mouth into the mouth, rather than steering everything with the tongue alone.
When most of the four are in place, you can offer the first tastes. Perfection is not required; watching for most of them is the practical bar.
Not Too Early, Not Too Late
Starting before 4 months offers no benefit and carries real risks, because swallowing readiness and gut readiness are not yet in place. The other extreme also has a cost: babies who reach nine or ten months with no textured food and no meat may miss the sensitive window for learning to chew and for accepting new tastes.
If you are unsure where your baby stands, record a short video of the baby sitting and of a spoon-feeding attempt, and show it to your pediatrician. A few seconds of video carries more information than a page of description.
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General guidance from the public sources above — not medical advice. For your baby’s specific situation, ask your pediatrician. See our medical disclaimer.