DHA Omega-3 (Prenatal)

DHA is an omega-3 fatty acid found in fatty fish and algae oil that is part of the brain and retina. Health organizations generally encourage getting omega-3s during pregnancy through low-mercury fish or, if you do not eat fish, a supplement. Research on whether DHA supplements change outcomes such as preterm birth or child development has had mixed results.

People who are pregnant or planning pregnancy, particularly if they eat little or no fish. Whether it suits you depends on your health, medicines and test results — ask a clinician.

Many authorities suggest at least about 200–300 mg of DHA per day in pregnancy from food and/or supplements. Ask your provider what is right for you. Doses vary by product and person; this is not personal medical advice.

Intake matters throughout pregnancy, including the third trimester.

Fishy aftertaste, burping, nausea or loose stools. Avoid fish-oil products if you have a fish or shellfish allergy unless your doctor says otherwise (algae-based products are an alternative).

Do not use cod liver oil as your omega-3 source during pregnancy — it contains high levels of vitamin A (retinol), which can cause birth defects at high doses.

Evidence level (our editorial summary, not a formal grading): Moderate.

Pregnancy & breastfeeding: Commonly included in prenatal vitamins or advised by providers. Choose products from reputable brands and tell your provider what you take.

Medication interactions: High doses may add to the effect of blood thinners.

Talk to a healthcare professional before use if you are pregnant, breastfeeding, planning pregnancy, have a medical condition, take any medicine, or are scheduled for surgery. Dietary supplements are not approved by the FDA for safety or effectiveness before they are sold, and quality varies between products.

Reliable sources to check: NIH Office of Dietary Supplements fact sheets · NCCIH Herbs at a Glance · MedlinePlus Herbs & Supplements · FDA — Dietary Supplements