Children's Vitamins: Which Ones Actually Matter

The children's vitamin aisle is a masterclass in anxiety marketing. Gummy bears shaped like dinosaurs promise stronger bones, sharper brains, and robust immunity. The reality: the AAP states that Dr. Mark Corkins, chair of the AAP Committee on Nutrition, notes that most children who eat a reasonably varied diet do not need a daily multivitamin.

Vitamin D is the one near-universal exception. The AAP recommends 400 IU daily for breastfed infants and 600 IU for children over one. Most children do not get enough from sun exposure alone, especially above the 37th parallel. A simple vitamin D drop for infants or a chewable tablet for older children covers this gap without a full multivitamin.

Iron matters for specific populations. Breastfed infants should start iron supplementation at four months. Toddlers who drink excessive milk (more than 24 ounces daily) are at risk for iron deficiency because milk inhibits iron absorption and displaces iron-rich foods. A simple blood test at the one-year well visit catches most cases.

Omega-3 fatty acids show promising but not conclusive evidence for brain development. Children who eat fish twice a week likely get enough. For the many children who refuse fish entirely, a supplement is reasonable but not urgent. Look for products tested by third-party labs for heavy metals — a 2022 ConsumerLab analysis found that 25% of children's fish oil products contained less omega-3 than labeled, and 10% exceeded acceptable oxidation levels.

What most children do not need: vitamin C supplements (dietary sources are abundant), biotin (deficiency is extremely rare in children), and probiotics (unless prescribed for a specific condition). The marketing around children's immune support supplements has far outpaced the evidence.

If you choose a multivitamin, look for third-party testing (USP, NSF, or ConsumerLab verification), age-appropriate dosing, and the absence of artificial dyes — several major gummy vitamin brands use dyes that some families prefer to avoid. And keep all supplements out of reach: iron-containing vitamins are a leading cause of pediatric poisoning deaths.