Postpartum depression (PPD) is a serious mental health condition that can affect your mood, behavior, and physical health after childbirth. It can cause symptoms such as sadness, hopelessness, anxiety, appetite changes, sleep changes, and trouble feeling connected to your baby. Treatment can help.

You may hear about supplements for postpartum depression, or you may wonder about the best vitamins for postnatal depression. Nutrients such as omega-3 fatty acids, vitamin D, B vitamins, and iron have been studied for their impact on PPD. However, there’s insufficient evidence to use diet changes or supplements alone to prevent or treat the condition.

Always discuss supplements with your doctor or dietitian before taking them. These products can cause side effects and interact with medicines.

Here’s what research says about dietary supplements for PPD.

Omega-3 Fatty Acids

Omega-3 fatty acids are fats found in foods and in the body, and they’re also sold as dietary supplements. Eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) are found in seafood and fish oil supplements.

Omega-3 supplements have been studied for depression, pregnancy, and the postpartum period. However, evidence that omega-3 supplements help depression is uncertain, and a review of omega-3s during pregnancy and postpartum found that none of the included studies showed an effect on depression or anxiety during the postpartum period.

Omega-3 fatty acids are available as supplements, often called fish oil, cod liver oil, or marine algae oil. Cod liver oil is different from ordinary fish oil because fish liver oils contain variable amounts of vitamins A and D, which can be harmful in excessive amounts.

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Vitamin D and Postpartum Depression

Research has explored vitamin D and postpartum depression because low vitamin D has been linked to mood symptoms in some observational studies. However, an association does not prove that vitamin D supplements prevent or treat PPD.

A 2022 systematic review found that the evidence on vitamin D and depression during pregnancy and postpartum was poor and inconclusive. The review concluded that current evidence is insufficient to establish a role for vitamin D in the cause, prevention, or treatment of depression during the perinatal period.

Vitamin D supports bone and immune health, as well as muscle and brain cell function, but too much vitamin D from supplements can be harmful. For adults, including during pregnancy and breastfeeding, 4,000 international units (IU) per day is the usual upper limit for daily vitamin D intake without medical supervision. Vitamin D toxicity generally happens with much higher or prolonged excessive intake and can cause symptoms such as vomiting, weakness, confusion, abnormal heart rhythms, kidney stones, or kidney damage.

Foods such as fatty fish, fish liver oil, fortified milk, and fortified cereal contain vitamin D. The body can also make vitamin D from direct sunlight on the skin. Your healthcare provider can use a blood test to check your vitamin D level and help you decide whether you need a supplement.

B Vitamins

Evidence does not establish that B vitamins relieve PPD. In one cohort study, red-cell folate status and intake of folate, vitamin B6, and vitamin B12 before or during pregnancy were not associated with postpartum depressive symptoms.

Folic Acid and Postpartum Depression

Folate is a B vitamin, and folic acid is the synthetic form used in supplements and fortified foods. Folic acid is important during early pregnancy because getting enough can reduce the risk of neural tube defects, which affect the developing brain and spinal cord.

That doesn’t mean folic acid is a proven PPD treatment. If you’ve searched for “folic acid postpartum depression” or “betasym postpartum depression supplement,” talk with your healthcare provider before adding a supplement.

Iron

The body needs iron to make hemoglobin, a protein in red blood cells that carries oxygen from the lungs to the rest of the body. Iron also helps the body make some hormones.

Low iron stores can lead to iron deficiency anemia. Symptoms may include fatigue, low energy, weakness, and a rapid heartbeat.

Iron deficiency and anemia have been studied as possible contributors to PPD. A review in the Journal of Psychosomatic Obstetrics and Gynaecology found that anemia and/or iron deficiency may contribute to PPD in at-risk women, but the evidence was limited by differences among studies.

In that review, postpartum iron supplementation was linked to a lower PPD risk in four of five studies, while iron given during pregnancy did not appear to protect against PPD. The review called for more research, so these findings do not show that iron treats depression.

Don’t take iron unless your healthcare provider recommends it. High-dose iron supplements can cause stomach upset, constipation, nausea, vomiting, diarrhea, and, in very high amounts, serious harm.

Talk to Your Doctor About Postpartum Depression Supplements

Proper nutrition supports your overall health and well-being. Eating a balanced diet with fruits and vegetables, whole grains, lean proteins, and healthy fats may help you meet your nutrient needs.

Still, PPD has multiple causes, and it cannot currently be prevented or treated through diet or supplementation alone. If you’re having baby blues or symptoms of depression, such as mood changes, low energy, sleep disturbances, or feelings of hopelessness during or after pregnancy, talk to your doctor.

Your doctor may want to test you for nutrient deficiencies and may recommend supplements if you have low levels of vitamins or minerals. Tell them about any prenatal vitamins, herbs, fish oil, cod liver oil, and over-the-counter products you take.

If you’re breastfeeding, discuss supplements thoroughly with your doctor. Some complementary medicines and supplements can transfer into breast milk, and some may affect a baby or milk production.

Managing PPD can involve several strategies, including lifestyle changes, self-care, counseling or psychotherapy, and antidepressant medications.