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Is a multivitamin safe for kids and teens?

Written by the Full Measure editorial team, which sells supplements. Approved for publication by the Full Measure owners. Updated .

Drafted with AI assistance from the sources listed below. How we write these

Quick answer

NIH reports that 34.6% of US children aged 2 to 5 and 29.5% of those aged 6 to 11 took a multivitamin in 2017 to 2018. Iron in these products is a leading cause of fatal poisoning in children under 6, and FDA requires a warning. Ask your doctor before giving a child or teen a multivitamin.1,2

Key facts

  • In a 2017 to 2018 survey, 11.0% of US children up to age 2, 34.6% aged 2 to 5, 29.5% aged 6 to 11 and 17.3% aged 12 to 19 took a multivitamin.1
  • Accidental swallowing of iron supplements caused about a third of poisoning deaths in US children reported from 1983 to 1991.2
  • FDA requires solid iron-containing supplements to carry a warning that accidental overdose is a leading cause of fatal poisoning in children under 6.2
  • Most children's multis provide nutrients in smaller amounts that suit children, NIH says.3
  • The upper limit for preformed vitamin A is 600 mcg a day to age 3, 900 mcg at 4 to 8, 1,700 mcg at 9 to 13 and 2,800 mcg for teens.4

How many children take a multivitamin?

NIH's health professional sheet reports that in 2017 to 2018, 11.0% of US children up to 2 years old, 34.6% of those aged 2 to 5, 29.5% of those aged 6 to 11 and 17.3% of those aged 12 to 19 had taken a multivitamin in the past 30 days. Use is more common among the children of women who take supplements.1

Why is iron the first thing to check?

Accidental swallowing of iron supplements caused about a third of the poisoning deaths in US children reported from 1983 to 1991. Keep any product that contains iron out of children's reach.2

NIH says at least 43 US children died from swallowing high-dose iron supplements between 1983 and 2000. In 1997 FDA began requiring single-dose packaging and strong warning labels for products with more than 30 mg of iron per dose, and between 1998 and 2002 only one child death from an iron tablet was reported. FDA currently requires solid iron-containing supplements to carry a warning that accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under 6, and that the product should be kept out of their reach.2

The upper limit for iron is 40 mg a day for children up to age 13 and 45 mg for teens. NIH says multivitamins with iron typically provide 18 mg, and that large overdoses cause serious damage to the gut and organs. Ask your doctor or poison control right away after any accidental overdose.1,2

Do adult and children's multivitamins differ?

Most children's multis provide nutrients in smaller amounts that suit children.3

NIH lists the upper limit for preformed vitamin A as 600 mcg a day for children up to age 3, 900 mcg at 4 to 8, 1,700 mcg at 9 to 13 and 2,800 mcg for teens, against 3,000 mcg for adults. Adult products can hold amounts well above a young child's limit.4

Going over an upper limit is more likely when a multi is combined with single vitamin or mineral supplements, or with fortified foods and drinks such as breakfast cereals.1,3

What about specialized, gummy or teen-marketed products?

Some multis are sold for a purpose such as energy, sport, immune function or eye health. These often add herbs or other ingredients such as green tea, coenzyme Q10 or probiotics, and some contain nutrients well above the Daily Value.1,3

The sources checked do not rule on gummy vitamins or on named teen products. NIH says no standard multivitamin formula exists, so one product's results cannot be applied to another. Read the Supplement Facts panel and ask your doctor or pharmacist.1

What about vitamin D for babies?

NIH reports that the American Academy of Pediatrics recommends 400 IU a day of vitamin D for exclusively and partially breastfed infants from the first days of life, and for non-breastfed infants who drink less than 1 liter of fortified formula or milk. Ask your child's doctor which supplement, if any, applies.1

Who should ask a doctor about a multivitamin for a child or teen?

  • Anyone who keeps iron-containing products where a young child can reach them.2
  • Anyone giving a child an adult multivitamin or a high-potency product.1,4
  • Anyone whose child takes other single vitamins or eats many fortified foods.1
  • Anyone whose child has a medical condition or takes a regular medicine.1

Ask your doctor, and keep every supplement out of children's reach.

Questions people ask

Is multivitamin good for teens?

NIH says use is 17.3% among ages 12 to 19 and that a multi cannot replace a varied diet. Ask your doctor whether a teen needs one.1,3

Are multivitamins safe for teens?

NIH lists an upper limit of 2,800 mcg a day of preformed vitamin A for teens and 45 mg for iron, counting all sources. Ask your doctor before a teen takes a multivitamin.2,4

Is multivitamin safe for kids?

NIH says most children's multis provide smaller amounts that suit children, but iron-containing products are a leading cause of fatal poisoning in children under 6. Ask your doctor.2,3

Are kids multivitamins good for teens?

NIH says most children's multis provide nutrients in smaller amounts right for children, and that products can be chosen for age, sex and life stage. Ask your doctor which suits a teen.3

Are gummy vitamins safe for teens?

The sources checked do not address gummies. NIH says no standard multivitamin formula exists and results from one product cannot be applied to another. Read the label and ask your doctor or pharmacist.1

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Sources

  1. National Institutes of Health, Office of Dietary Supplements. Multivitamin/mineral Supplements: Fact Sheet for Health Professionals. Updated July 17, 2024. Opened 2026-10-01.
  2. National Institutes of Health, Office of Dietary Supplements. Iron: Fact Sheet for Health Professionals. Updated September 4, 2025. Opened 2026-10-07.
  3. National Institutes of Health, Office of Dietary Supplements. Multivitamin/mineral Supplements: Fact Sheet for Consumers. Updated February 15, 2024. Opened 2026-10-07.
  4. National Institutes of Health, Office of Dietary Supplements. Vitamin A and Carotenoids: Fact Sheet for Consumers. Updated March 10, 2025. Opened 2026-10-07.

This page is information, not medical advice. Talk to your doctor or pharmacist about your own situation.