DHA in prenatal vitamins is docosahexaenoic acid , an omega-3 fat that supports your baby’s brain, eye, and nervous system development during pregnancy. It’s also commonly included because pregnant people may not get enough DHA from diet alone, especially if they eat little fatty fish.

Quick Scoop

  • What it is: An essential omega-3 fatty acid.
  • Why it’s in prenatal vitamins: To help support fetal brain and eye development.
  • Possible added benefit: Some research links adequate DHA intake with a lower risk of preterm birth, though evidence is mixed for other pregnancy outcomes.
  • Food sources: Fatty fish and algae-based supplements are common sources.

Simple takeaway

If you see “DHA” on a prenatal label, think “omega-3 for baby’s development.” It’s a common and generally important prenatal nutrient, but the best dose and whether you need a separate DHA supplement can depend on your diet and your clinician’s advice.

If you want, I can also explain how much DHA is usually recommended in pregnancy and whether your prenatal already has enough.