Berberine in Pregnancy and Breastfeeding
A clear, unambiguous answer on berberine during pregnancy and breastfeeding, with the sources it rests on and who to speak to instead.
Berberine is not suitable during pregnancy or while breastfeeding. That is the position, and there is no version of it that comes with a workaround. The reasoning rests on a documented concern about bilirubin buildup in infants, and on the broader principle that herbal and dietary supplements have not been shown to be safe in pregnancy.
Key takeaways
- NCCIH states that berberine "is likely to be unsafe for infants and may also be unsafe for use during pregnancy or while breastfeeding".
- The stated concern is a harmful buildup of bilirubin in infants, which NCCIH notes can cause brain damage.
- NHS guidance does not recommend herbal products or dietary supplements in pregnancy, breastfeeding or when planning a baby, because there is not enough reliable information about their safety.
- The HSE's pregnancy supplement advice covers folic acid and vitamin D, and directs people to a pharmacist or GP.
- If you took berberine and then discovered you are pregnant, speak to your GP or midwife.
On this page
The short answer
Do not take berberine if you are pregnant, breastfeeding, think you might be pregnant, or are trying to conceive. Products sold in Ireland carry the statement that they are not suitable for pregnant or breastfeeding women, and it should be taken at face value rather than as routine legal wording. Most questions about berberine end in uncertainty. This one does not need to.
What NCCIH says, and why
The National Center for Complementary and Integrative Health, part of the US National Institutes of Health, is explicit. Berberine "is likely to be unsafe for infants and may also be unsafe for use during pregnancy or while breastfeeding because of possible effects on the fetus or infant".
The specific concern it names is bilirubin. In its words, "exposure to berberine has been linked to a harmful buildup of bilirubin in infants, which can cause brain damage".
Bilirubin is the yellow pigment produced when red blood cells break down. Newborn livers are not yet efficient at clearing it, which is why mild jaundice is common in the first days of life. Anything that raises it further, or interferes with the way it is bound and transported, is a meaningful concern in a newborn rather than a theoretical one.
Note the careful language. "Likely to be unsafe" for infants is stronger than "may also be unsafe" in pregnancy or breastfeeding, which reflects where the evidence is stronger. Neither phrase amounts to permission.
What the NHS says about supplements in pregnancy
The wider principle does not depend on berberine. NHS guidance on herbal remedies and dietary supplements states: "If you're pregnant, breastfeeding, think you might be pregnant, or are planning to have a baby, we do not recommend taking any herbal products or dietary supplements." The reason given is that there is not enough reliable information about their safety in pregnancy.
That explains why the answer is not "we found harm" but something more fundamental. Pregnant women are, for obvious ethical reasons, excluded from almost all supplement trials, so the safety data needed to clear a product for use in pregnancy is never generated. In pregnancy, that absence is treated as a reason not to proceed.
What the HSE actually recommends in Ireland
It is easy to attribute more to the HSE than it actually says. Its published pregnancy advice covers specific nutrients. It does not, on the pages we reviewed, issue general guidance on herbal supplements, so the caution above is attributed to the NHS rather than to the HSE. What the HSE does say:
| Supplement | HSE position | Amount stated |
|---|---|---|
| Folic acid | Recommended for women who can get pregnant, before and during pregnancy | 400 micrograms daily |
| Vitamin D | Recommended during pregnancy, unless a GP or maternity unit advises otherwise | 15 micrograms daily |
| Iron | Only if recommended by a GP, obstetrician or midwife | As advised individually |
| Berberine | Not covered by HSE guidance. NCCIH advises it may be unsafe in pregnancy and breastfeeding and is likely to be unsafe for infants | Not applicable |
The HSE also advises people to "ask your pharmacist about the best product for you", and its healthy eating in pregnancy guidance points back to a GP, midwife or maternity team. That is the right route for any supplement question in pregnancy.
Breastfeeding and infants
The caution extends past birth. NCCIH's strongest wording concerns infants directly, and the bilirubin concern applies to the newborn rather than to the pregnancy. Substances taken by a breastfeeding mother can pass into breast milk, and the amount that does so has not been established for berberine.
Berberine should never be given directly to an infant or young child. Keep any food supplement out of the reach of young children, which is a labelling requirement in Ireland for exactly this reason.
If you have already taken it
People often find out they are pregnant weeks after conception, so it is common to have taken something in the meantime. If that is your situation, stop taking the supplement, keep the bottle because the label lists everything that was in it, and tell your GP or midwife at the next opportunity, bringing the bottle or a photo of the label. They can consider your actual circumstances, including how much you took and when, which no article can do.
Who to ask
A pharmacist can answer questions about a specific product without an appointment. Your GP, midwife or maternity unit is the right contact for anything relating to the pregnancy itself. If you are planning a pregnancy, that is the point at which to review everything you take, including supplements, with one of them.
For related reading, see our guides on berberine side effects and safety, berberine and medicines, what berberine is and reading food supplement labels in Ireland.
Frequently asked questions
Can I take berberine while trying to conceive?
No. NHS guidance covers people "planning to have a baby" alongside those already pregnant, and does not recommend herbal products or dietary supplements in either situation. Because pregnancy is often confirmed several weeks after conception, treating the planning stage the same as pregnancy is the cautious approach. Speak to your GP or pharmacist about what is appropriate instead.
Is a lower dose of berberine acceptable in pregnancy?
No. There is no established safe amount in pregnancy, and EFSA's 2026 draft opinion could not establish a safe intake for humans at all. Reducing a dose does not turn an unquantified risk into a known one. The advice is not to take it, rather than to take less of it.
What exactly is the bilirubin concern?
Bilirubin is produced when red blood cells break down and is cleared by the liver. Newborn livers clear it slowly, which is why jaundice is common in early infancy. NCCIH states that exposure to berberine has been linked to a harmful buildup of bilirubin in infants, which can cause brain damage. That is the specific reason berberine is singled out rather than treated as a general unknown.
I took berberine before I knew I was pregnant. What should I do?
Stop taking it and speak to your GP or midwife at the next opportunity. Bring the bottle or a clear photo of the full label so they can see every ingredient and the serving size. They can consider how much you took and when, which is the information that actually matters. Try not to draw conclusions from general articles, including this one.
Does the HSE say herbal supplements are unsafe in pregnancy?
Not in the guidance we reviewed. The HSE's pregnancy supplement pages cover folic acid, vitamin D and iron, and direct people to a pharmacist, GP or maternity team. The general statement that herbal products and dietary supplements are not recommended in pregnancy comes from NHS guidance. We have attributed each point to the body that actually made it.
Sources and further reading
- National Center for Complementary and Integrative Health (NIH). Berberine and Weight Loss: What You Need To Know. Accessed 13 August 2026.
- Guy's and St Thomas' NHS Foundation Trust. Herbal remedies and dietary supplements. Accessed 13 August 2026.
- HSE. Folic acid when planning a pregnancy. Accessed 13 August 2026.
- HSE. Healthy eating during pregnancy. Accessed 13 August 2026.
- Committee on Toxicity (UK). Draft Scientific Opinion on the safety of plant preparations containing berberine, reproducing EFSA's draft conclusions. Accessed 13 August 2026.
- Food Safety Authority of Ireland. Food Supplements. Accessed 13 August 2026.