Which herbs to avoid in pregnancy

Pregnancy is the one situation where “it’s natural, so it’s safe” is most often said and least defensible.

It is also where the honest answer is most often “we do not know”, because pregnant women are, for good ethical reasons, excluded from most clinical trials. That absence of evidence gets read in two opposite and equally wrong ways: by sellers as “no known harm”, and by worried families as “everything is dangerous”.

We manufacture herbal products, including in the women’s health category. This is the list we work from, and the reasoning behind it.

This is information, not medical advice. Tell your obstetrician about everything you are taking, including anything herbal, traditional or given by family. If you are pregnant and already took something on this list, do not panic, speak to your doctor rather than drawing conclusions from an article.

Why the evidence is thin, and what that means

Pregnant women are excluded from trials because exposing a fetus to an untested substance for research purposes is not ethically acceptable. So what we know about herbs in pregnancy comes from animal studies, from case reports, from traditional texts, and from pharmacological reasoning.

That means most herbs sit in a category of “not established as safe” rather than “established as harmful”.

And the practical conclusion follows from the asymmetry of the stakes: a supplement you skip for nine months costs you very little. A harm you cause is not reversible. So in pregnancy the sensible default is avoid unless there is a specific reason, cleared by your doctor, not “avoid only what is proven dangerous”.

That is a different standard from the rest of life, and it is the right one here.

The clearest concerns

Emmenagogues and uterine stimulants

Herbs traditionally used to bring on menstruation or to stimulate the uterus. The traditional use is itself the warning, these were used for that purpose.

• Kalonji in large medicinal doses, culinary use is a different matter
• Myrrh
• Pennyroyal, genuinely toxic, and associated with deaths
• Blue cohosh
• Dong quai
• Mugwort
• Rue (satap)
• Tansy

Papaya deserves a specific note, since it is the most commonly discussed in India. Unripe or semi-ripe papaya contains latex with papain, and traditional caution against it in pregnancy is widespread. The concern relates to the unripe fruit and its latex; ripe papaya in normal food quantities is generally considered acceptable, though many obstetricians in India advise avoiding it altogether, and following your own doctor’s view is reasonable.

Stimulant laxatives

• Senna / sonamukhi
• Aloe vera latex (the yellow bitter layer, not the inner gel)
• Cascara
• Castor oil, historically used to induce labour, which is precisely the concern

Constipation is extremely common in pregnancy, and these are what people reach for. The appropriate approach is fibre, fluid and bulk-forming agents, psyllium is generally considered acceptable, with your doctor’s confirmation, rather than stimulants.

Triphala contains haritaki and has a laxative action. It is widely used in India and often assumed harmless. We advise against it in pregnancy without obstetric clearance.

Herbs with hormonal activity

Shatavari is interesting because it is simultaneously the most-recommended and the most-questioned herb here. It has long classical use in pregnancy and lactation, and it also has phytoestrogenic activity. The traditional record is strong; controlled safety data is absent.

Our position: not without your doctor’s agreement, despite the traditional use. The traditional record is a reason to take it seriously, not a substitute for clearance.

Also in this group: liquorice / mulethi (see below), red clover, black cohosh, vitex / chasteberry, saw palmetto, which has anti-androgenic activity and is specifically inappropriate.

Ashwagandha

Avoid in pregnancy. Classical sources include it among herbs that can affect pregnancy, and some texts associate it with abortifacient potential. Modern safety data in pregnancy is absent.

It is one of the most widely sold herbs in India, frequently taken for stress and sleep by women who may not realise they should stop. Worth knowing before conception rather than after.

Liquorice / mulethi

Specific and well-characterised: glycyrrhizin raises blood pressure and lowers potassium through a mineralocorticoid effect. In pregnancy, where hypertensive disorders are a major concern, that is not a minor matter. There has also been research associating high liquorice consumption in pregnancy with effects on the child.

It appears in many cough and digestive preparations, often without the pregnant woman noticing it.

Vitamin A and liver

Not a herb, but it belongs here because it is the clearest teratogenic risk in the supplement aisle.

High-dose preformed vitamin A (retinol) is teratogenic. So:

• Check your multivitamin’s retinol content, a prenatal formulation is designed for pregnancy; a general multivitamin may not be
• Avoid liver and liver products, which are extremely high in retinol
• Avoid cod liver oil for the same reason
• Beta-carotene is not the same thing and is not a concern
• Oral retinoid acne medications are strongly teratogenic and require contraception, this is managed by dermatologists and is well outside the supplement question, but it is the most serious item on this page

Essential oils

Many are inappropriate internally in pregnancy, and some topically. Never take essential oils internally. For topical use and aromatherapy, check each one.

Anything with heavy metal risk

Bhasma and rasa shastra preparations containing metallic ingredients, and unverified shilajit, heavy metal contamination is a documented problem in parts of the Indian market, and lead crosses the placenta. This is not a theoretical concern; it is the one we would weight most heavily.

Only buy products with batch-wise heavy metal testing, and in pregnancy, prefer not to take them at all.

Herbs that are generally considered acceptable

Avoiding everything is not the answer either, and this part matters for quality of life.

Ginger, one of the better-studied options, with reasonable evidence for nausea and vomiting in pregnancy, and widely recommended by obstetricians. Usual advice is to keep to modest amounts.

Culinary spices in food quantities, turmeric, cumin, coriander, fennel, cinnamon, cardamom in cooking. The distinction between a culinary amount and a concentrated supplement dose is the whole point. Turmeric in dal is not a curcumin capsule.

Peppermint tea, in moderation, for nausea.

Psyllium husk for constipation, with your doctor’s agreement.

Prenatal vitamins as prescribed, folic acid, iron, calcium, vitamin D, B12, DHA.

Folic acid before conception is the single most valuable item in this entire area, with population-scale evidence behind it for neural tube defect prevention. Started before conception, not after a positive test.

The herbs wrongly feared

Also worth saying, because unnecessary avoidance has its own cost.

Turmeric in cooking is fine. The caution applies to high-dose curcumin supplements.

Normal tea and coffee in moderation. Current advice generally permits limited caffeine rather than demanding abstinence, your obstetrician will give you a number. Worth remembering that tea with meals reduces iron absorption, which matters separately.

Curd, buttermilk and most fermented foods are fine, and useful.

Most vegetables that feature in long “avoid” lists circulating on messaging apps.

And a general note: a large share of pregnancy dietary restrictions passed around in Indian families have no basis, and they can crowd out foods a pregnant woman genuinely needs. If a restriction is making it hard to eat adequately, ask your doctor rather than accepting it.

Breastfeeding

Different, and somewhat less restrictive, but substances do pass into milk.

Generally avoided: senna and stimulant laxatives, liquorice, high-dose anything, and sage and peppermint in large amounts, which have traditional use for reducing milk supply.

Traditionally used as galactagogues: methi (fenugreek), shatavari, and dill. Fenugreek is the most studied and the evidence is mixed rather than convincing; it can cause gastrointestinal upset in mother and baby, and it affects blood sugar, which matters for diabetic mothers.

The honest point about galactagogues: the strongest determinants of milk supply are effective latch and frequent feeding. A lactation consultant will do more for supply than any herb. Supply concerns are very often latch or positioning problems, and treating them as a nutritional deficit sends mothers to the wrong solution.

What to do, practically

1. Make a list of everything you take, prescriptions, supplements, herbal products, anything family has given you, and show it to your obstetrician. The list is the single most useful action here.
2. Default to stopping non-essential herbal products during pregnancy.
3. Keep prenatal vitamins as prescribed.
4. Distinguish culinary from medicinal. Spices in food are not the question.
5. Do not accept “it’s natural” from a seller, a relative, or a label.
6. Do not accept “it’s traditional” as safety data either. Traditional use is meaningful information and it is not a controlled trial.
7. If you already took something, tell your doctor, do not panic, and do not hide it.
8. Planning a pregnancy? Review your supplements before conceiving, and start folic acid then. The first weeks matter most and are the weeks you do not know about.

What we will not do

We manufacture in the women’s health category, and this is a firm line.

We decline to market any herbal product for use in pregnancy without obstetric supervision, and we decline artwork claiming to support pregnancy, boost milk supply, or ensure a healthy baby. In India, claims relating to conception and pregnancy also fall within the Drugs and Magic Remedies (Objectionable Advertisements) Act.

We require a pregnancy-and-lactation caution on herbal artwork, because women read labels and families often do not ask doctors.

And we will not take the position that absence of evidence means safety. In every other category, that argument costs a customer some money. Here it can cost something that cannot be undone, and no order is worth that.

The short version

1. “Not established as safe” is the honest status of most herbs in pregnancy, not “safe”, and not “proven harmful”.
2. Default to avoiding non-essential herbal products for nine months. The downside of skipping is small; the downside of being wrong is not.
3. Specific concerns: senna and stimulant laxatives, aloe latex, castor oil, ashwagandha, liquorice/mulethi, triphala, saw palmetto, emmenagogue herbs, unripe papaya, bhasma and unverified shilajit.
4. Shatavari has strong traditional use and no controlled safety data, only with your doctor’s agreement.
5. High-dose retinol is teratogenic. Check your multivitamin; avoid liver and cod liver oil. Beta-carotene is fine.
6. Generally acceptable: ginger for nausea, culinary spices, psyllium, prescribed prenatal vitamins.
7. Folic acid before conception is the most valuable thing on this page.
8. Breastfeeding: latch and feeding frequency matter far more than any galactagogue.
9. Show your obstetrician the whole list. That one action covers most of this article.

Related: folate before conception and the four nutrients Indian vegetarians most often lack.