Health guide
Supplements in Pregnancy: What Is Recommended and What to Avoid
Pregnancy is the one area of nutrition where supplement evidence is genuinely strong, and also the one where the wrong product does the most harm. The recommended list is short; the avoid list is longer.
This page is not a substitute for antenatal care
Antenatal care in every country covered here includes nutritional guidance, and national programmes provide supplementation. What follows is background to help you understand that advice, not to replace it.
Speak to your midwife, nurse or doctor about anything you take, including products you started before pregnancy.
Folic acid: the clearest evidence in nutrition
Folic acid taken before conception and in early pregnancy reduces the risk of neural tube defects. This is among the best-established findings in nutritional science.
Timing is what makes it difficult. The neural tube closes in the first weeks, often before a pregnancy is confirmed, which is why supplementation is advised from the point of planning rather than the point of confirmation.
Iron and iodine
Iron deficiency anaemia is common in pregnancy across the region and is routinely addressed in antenatal care, with dose guided by testing.
Iodine supports fetal brain development, and iodised salt is the main public health route. Requirements rise in pregnancy.
What to avoid
High-dose preformed vitamin A (retinol) is teratogenic and should be avoided. Check any multivitamin for its retinol content, and avoid liver-based supplements and high-dose cod liver oil.
Most herbal supplements have not been studied in pregnancy, and several traditional preparations are specifically discouraged. Absence of evidence in this context should be treated as a reason for caution.
- High-dose retinol and vitamin A-rich supplements
- Herbal products not specifically cleared by your midwife or doctor
- Weight-management products of any kind
- High-dose single nutrients not advised by a clinician
- Traditional preparations of unknown composition
Breastfeeding
Nutrient requirements remain elevated during breastfeeding, and some compounds pass into breast milk. The same caution about herbal products applies.
Products marketed to increase milk supply have limited evidence, and fenugreek — the most commonly used — has mixed trial results despite widespread traditional use.
Frequently asked questions
When should I start folic acid?
Ideally at least a month before conception and through the first trimester. Discuss the dose with your clinician, since it differs for some women.
Can I take herbal teas in pregnancy?
Some are fine in ordinary amounts and some are not. Ask your midwife about the specific plant rather than assuming that traditional use implies safety.
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Medical disclaimer. BioMedic Africa publishes consumer health information and supplement research summaries. It is not a pharmacy, a clinic or a medicines regulator, and nothing here is a diagnosis, a prescription or a treatment plan. Dietary supplements are foods, not medicines: they are not intended to diagnose, treat, cure or prevent any disease. Speak with a pharmacist or a qualified healthcare professional before starting any supplement, especially if you are pregnant or breastfeeding, under 18, living with a long-term condition, or taking prescription medication.