What nutrients should be consumed during pregnancy?

Pregnancy is a period of heightened nutritional demand, requiring careful attention to both macronutrient and micronutrient intake to support maternal health and optimal fetal development. A balanced diet should emphasize whole foods—including lean proteins, complex carbohydrates, healthy fats, fruits, vegetables, and fortified dairy or dairy alternatives. Key nutrients with increased requirements during pregnancy include:

Folic acid (vitamin B9)—Critical for neural tube closure in early gestation; supplementation of 400–800 mcg daily is recommended starting before conception and continuing through at least the first trimester.

Iron—Needed to expand maternal red blood cell mass and prevent iron-deficiency anemia; the Recommended Dietary Allowance (RDA) increases to 27 mg/day. Heme iron from animal sources is best absorbed, but non-heme iron (e.g., from legumes, spinach) can be enhanced by concurrent vitamin C intake.

Calcium (1,000 mg/day) and vitamin D (600 IU/day)—Essential for fetal skeletal mineralization and maternal bone health. Vitamin D also supports immune regulation and placental function.

Iodine (220 mcg/day)—Vital for fetal thyroid hormone synthesis and neurodevelopment; iodized salt and seafood are reliable dietary sources.

DHA (docosahexaenoic acid), an omega-3 fatty acid (200–300 mg/day)—Supports fetal brain and retinal development; found in fatty fish (e.g., salmon, sardines), algae-based supplements, or prenatal vitamins containing algal oil.

Additional considerations include adequate hydration (≈2.3 L/day), limiting added sugars and ultra-processed foods, avoiding alcohol and high-mercury fish (e.g., shark, swordfish), and practicing food safety to reduce risk of listeriosis or toxoplasmosis. Individual needs may vary based on pre-pregnancy BMI, medical conditions (e.g., gestational diabetes, hypertension), or multiple gestation—thus personalized counseling with a registered dietitian or obstetric provider is strongly advised.