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The short version
- Signs include pale skin, tiredness or extra naps, irritability, and craving non-food items like dirt, paper or ice (pica).
- Many toddlers have no obvious signs, so the AAP now recommends screening every child between 9 and 18 months.
- Drinking more than 24 oz of milk a day (cow's or plant-based) is one of the biggest risk factors.
- Testing is a blood count plus ferritin. Treatment is led by your pediatrician — never start iron on your own.
The signs to watch for
The classic signs of iron deficiency in toddlers are pale skin, tiredness or needing more naps, irritability, and craving or chewing things that aren’t food, according to the American Academy of Pediatrics.2 The catch is that these signs creep in slowly, and many toddlers with low iron show none of them.1
That’s why, since June 2026, the AAP recommends a blood screening for every child between 9 and 18 months, rather than waiting for symptoms.13
| Where | What you might notice |
|---|---|
| Skin and face | Pale, yellowish or ashy skin; faded color in cheeks, lips, nail beds and inner eyelids |
| Energy | Tiredness, more or longer naps, mild muscle weakness |
| Mood | Fussiness, irritability or low mood; less interest in play |
| Eating | Craving or chewing dirt, paper, wipes, cardboard or ice (pica) |
| More severe anemia | Shortness of breath, fast heartbeat, swollen hands or feet, dizziness or fainting |
Pale skin is harder to spot than it sounds. Because the change is gradual, parents often don’t notice it, and in children with olive or darker skin it may look sallow or more yellow than usual rather than pale.1 A pediatrician can check inside the eyelids and nail beds.
Pica: the sign parents most often miss
Pica means repeatedly eating or chewing on things that aren’t food. In young children the AAP lists dirt, rocks, paper, wipes and cardboard; older children may crave ice.1 What’s worth mentioning to your doctor is a persistent pattern — a child who seeks out dirt or chews paper again and again — and the AAP says any child with pica should have their iron checked.1
Pica matters for a second reason. Children who are low in iron absorb lead more readily, and eating soil, paint chips or other non-food items raises the chance of swallowing it.1 If your child has pica, ask your pediatrician whether a lead test makes sense too.
Why toddlers are at risk
Iron deficiency is common: national data from 2003 to 2010 found it in about 15% of toddlers, and up to 3% had progressed to anemia.1 The main reasons are about diet and timing.
- Too much milk. Drinking more than 24 oz a day of cow’s milk or plant-based milk is the biggest red flag. Milk has very little iron and fills small stomachs.1 Our guide to how much milk a toddler should drink has a plan for cutting back.
- The switch from formula. Iron-fortified formula gives a baby 5 to 9 mg of iron a day; cow’s milk supplies under 1 mg. That drop around the first birthday creates a vulnerable window in the second year.1
- Cow’s milk before 12 months. It can cause small amounts of blood loss in the stool and lowers iron absorption.2
- Few iron-rich foods. A picky eater who skips meat, beans and fortified cereal can fall short. See toddler won’t eat meat for workarounds.
- Vegetarian or vegan diets without planning for plant sources of iron.1
- Premature birth, along with some health conditions, raises the risk.24 The AAP also lists obesity and food insecurity as risk factors.1
How it’s tested
The AAP’s 2026 guidance recommends screening every child once between 9 and 18 months, timed by how they were fed in the first year.1
| Child | When |
|---|---|
| Mostly breastfed in year one | 9–12 months |
| Mostly iron-fortified formula in year one | 15–18 months |
| Any child with risk factors (lots of milk, few iron-rich foods, obesity) | Checked for risk at each well visit until age 4; tested if needed |
| Any child with signs such as pallor, fatigue or pica | Tested when signs appear |
The screen is a blood test with two parts:1
- A complete blood count (CBC) measures hemoglobin and the size of red blood cells. Low hemoglobin with small red cells points to iron deficiency anemia.
- Serum ferritin estimates how much iron is stored. It can show low iron before anemia develops — which is the point of checking it. The AAP now treats a ferritin of 20 ng/mL or below as iron deficiency in young children.
Ferritin can read falsely normal while a child is ill or has inflammation, so your doctor will interpret it alongside any recent illness.1 If you’re not sure whether your toddler has been screened, ask at the next checkup.
Treatment is led by your pediatrician
If your toddler’s iron is low, the usual treatment is a once-daily iron medicine by mouth, at a dose your pediatrician works out from your child’s weight.13 Alongside it, the doctor will usually suggest cutting milk to under 24 oz a day and adding iron-rich foods; moving from bottle to cup often helps the milk come down.1
What to expect:1
- A recheck after about a month, with a blood test to make sure iron is working.
- About 3 months of treatment in total, even after hemoglobin is back to normal, to refill iron stores. Ferritin is checked again at that point.
- Possible side effects: dark stools, constipation, tummy upset, and temporary tooth staining from liquid iron. Iron is best given on an empty stomach or with water, not with milk.
If iron causes hard stools, our guide to foods that help toddler constipation can help — but don’t stop the iron without talking to your doctor.
Iron medicine works — but the dose, the length and the follow-up belong to your pediatrician.
A safety warning about iron supplements
Never start an iron supplement on your own “just in case.” Iron products carry a label warning because accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under 6.4 Keep any iron — including adult vitamins with iron — locked away and out of reach. If you think your child has swallowed iron pills, call Poison Help at 1-800-222-1222 right away (or 911 in an emergency), even if they seem fine.5
For preventing deficiency through food, read how much iron a toddler needs.
When to talk to your pediatrician
Ask your child's doctor about iron if your toddler
- Looks pale, or seems unusually tired or irritable for weeks
- Craves or eats dirt, paper, ice or other non-food items
- Drinks more than 24 oz of cow's or plant milk most days
- Eats very few iron-rich foods, or follows a vegetarian or vegan diet
- Hasn't had an iron screening by 18 months
Shortness of breath, a fast heartbeat, swelling of the hands or feet, dizziness or fainting can be signs of more severe anemia — call your pediatrician the same day, and seek urgent care if your child seems very unwell.2
Common questions
What are the first signs of iron deficiency in a toddler?
Early signs are subtle — pale skin, lips or nail beds, tiredness or needing more naps, fussiness or low mood, and sometimes craving non-food items like dirt or paper. Many toddlers have no noticeable signs, which is why the AAP recommends blood screening.
What causes iron deficiency in toddlers?
The most common cause is diet — especially drinking more than 24 ounces of cow's or plant-based milk a day and eating few iron-rich foods. Starting cow's milk before 12 months, prematurity and vegetarian or vegan diets without planning also raise the risk.
How do doctors test for iron deficiency in toddlers?
Under the AAP's 2026 guidance, screening uses a complete blood count, which checks hemoglobin and red cell size, plus serum ferritin, which estimates iron stores. Ferritin picks up low iron before anemia develops.
At what age are toddlers screened for low iron?
The AAP recommends screening every child once between 9 and 18 months — at 9 to 12 months if they were mostly breastfed and 15 to 18 months if they mostly had iron-fortified formula. Doctors also ask about risk factors at later checkups until age 4.
How is iron deficiency anemia treated in toddlers?
Usually with a once-daily oral iron medicine prescribed by your pediatrician, plus less milk and more iron-rich food. Blood is rechecked after about a month, and treatment typically continues for about 3 months to refill iron stores.
Can I give my toddler an iron supplement myself?
No — only if your pediatrician recommends one, at the dose they set. Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under 6, so keep any supplements locked away.
Sources
- Powers JM, et al; AAP Section on Hematology/Oncology, Committee on Nutrition. Pediatrics. 2026;158(1):e2026077414. Prevention, Screening, Diagnosis, and Treatment of Iron Deficiency and Iron Deficiency Anemia in Infants, Children, and Adolescents: Clinical Report.
- American Academy of Pediatrics, HealthyChildren.org. Iron Deficiency and Anemia in Babies, Children & Teens.
- American Academy of Pediatrics, HealthyChildren.org. Iron Deficiency & Iron Deficiency Anemia: AAP Updates Screening, Prevention & Treatment Guidance.
- NIH Office of Dietary Supplements. Iron: Fact Sheet for Consumers.
- Health Resources and Services Administration. Poison Help.
This article is for general information and isn't a substitute for advice from your child's doctor. Our editorial standards.
