Vitamin A for children: food, deficiency and measles

Why do children need vitamin A?

Vitamin A helps normal growth, vision and the body’s defences against infection. Children can get it in different forms: some animal foods and fortified products contain preformed vitamin A, while some orange and green vegetables contain pigments the body can turn into it. Food choices and textures must suit a child’s age. A normal role in immunity does not prove that extra vitamin A prevents every infection.

For the different forms, see how vitamin A gets from food to the body. For the evidence on infections and immune claims, see vitamin A and immunity.92

Does every child need the same supplement?

No. Advice depends on age, food and milk intake, health, and local guidance. For example, the UK NHS recommends vitamin drops containing A, C and D for children from six months to five years, with an exception for babies receiving fortified infant formula. The NHS vitamins page says babies having more than 500 mL of formula a day should not be given vitamin supplements; another NHS page describes 500 mL or more. Ask a health visitor or pharmacist if the amount is near that boundary. Its guidance also treats vitamin D from birth separately. Check the actual product label and local advice, or ask a child-health professional; do not assume UK advice applies everywhere.

WHO’s recommendation for a targeted programme in settings with a public-health deficiency problem is a different intervention from a daily children’s product. WHO does not recommend routine vitamin A for newborns to reduce newborn or infant mortality. That does not rule out treatment for a diagnosed condition.21811

Why do some countries run vitamin A programmes?

Where many young children are deficient, the consequences can include impaired vision and greater vulnerability to serious infection. WHO recommends a public-health vitamin A programme for children aged 6–59 months in settings where deficiency is a public-health problem. The decision is based on population evidence and local policy, not an assumption that every child everywhere is deficient.

These programmes are planned and delivered by health services. They are not instructions to copy a high-dose schedule at home.110

What does the evidence for programmes show?

A 2022 Cochrane review combined 19 trials involving about 1.2 million children and estimated a 12% relative reduction in deaths from any cause in the supplement groups compared with control groups. The studies covered different settings and did not all find the same effect; a relative figure is not the number of children helped out of every 100.6

To make the relative figure concrete, the review used the control risk from DEVTA—about 26 deaths per 1,000 children—as an example. Applying the pooled estimate gives about 23 deaths per 1,000 children.6

The 95% confidence interval is 22 to 24 per 1,000. The latter figures are calculated estimates, not observed counts from one new trial. Follow-up and baseline risks varied across studies; the absolute difference can be different in another setting.6

For example, the large DEVTA trial in northern India estimated about 2.5% mortality in the vitamin A areas versus 2.6% in control areas between ages one and six. Its uncertainty included both a benefit and no difference. These findings must be read together, with local deficiency and health conditions in mind; they do not predict an individual child’s outcome.7

The review also found more vomiting within 48 hours after supplementation in four trials. This finding concerns the studied programmes, not the risk from every children’s product.6

What if a child might have measles?

Contact a healthcare service promptly if you suspect measles or exposure. Call ahead before visiting so the service can arrange care and reduce exposure to others. If the child has difficulty breathing, becomes unusually drowsy or confused, shows signs of dehydration, or is getting rapidly worse, seek emergency care immediately; have someone call ahead if possible without delaying urgent care. Local services can give instructions.

If a child has been exposed but has no symptoms, contact a healthcare professional immediately rather than waiting for a rash. The US CDC says the clinician can check immunity and, for some people who are not immune, consider MMR vaccination or immune globulin after a recent exposure. Eligibility and timing matter, and local guidance may differ.4

Does vitamin A prevent or treat measles?

Vitamin A is not a reliable way to prevent measles and is not a substitute for vaccination. WHO recommends vitamin A as part of clinician-directed care for suspected measles in children under five; the US CDC describes vitamin A under health-professional supervision. Needs and clinical guidance depend on the situation. Care can also include assessment and treatment of complications. Do not give high-dose vitamin A at home as a substitute for medical care or vaccination.35

Could a child get too much?

Yes. Children can be harmed by too much preformed vitamin A, including when products overlap or a child swallows a supplement accidentally. Keep supplements out of children’s reach. If too much may have been swallowed, contact a poison service or urgent medical service promptly even if the child seems well; severe symptoms need emergency help. Have the packaging ready. Find country-specific contacts and more context in too much vitamin A.95

What if I am worried about deficiency?

A narrow diet, illness or problems absorbing fat can raise questions about intake, but a symptom or a label cannot diagnose deficiency. A child-health professional can consider growth, diet, health history, examination and appropriate tests together. For why blood retinol is not a simple readout of liver stores, read deficiency and night vision. Return to the vitamin A overview for the wider picture.910