is sassafras tea safe during pregnancy

Quick verdict: ❌ Best avoided. Sassafras tea contains safrole, a compound linked to liver toxicity and possible fetal harm, so most obstetric guidelines recommend not drinking it while pregnant.

It’s completely understandable to feel a knot in your stomach when you discover you’ve been sipping sassafras tea and wonder is sassafras tea safe during pregnancy. You might have bought a nostalgic bottle at the farmer’s market, or perhaps a friend offered you a warm cup during a late‑night craving. Either way, you deserve a calm, evidence‑based answer—not a panic‑filled headline.

Current guidance from the American College of Obstetricians and Gynecologists (ACOG), the UK’s National Health Service (NHS), and the U.S. Food and Drug Administration (FDA) all point to the same conclusion: avoid sassafras tea throughout pregnancy and while breastfeeding. In the sections that follow we’ll break down exactly why, what the research says about each trimester, how much (if any) might be considered “safe,” which brands to steer clear of, and what soothing herbal teas you can enjoy instead.

We’ll also cover the chemistry behind the herb—particularly the compound safrole—its legal status, potential risks for miscarriage and fetal development, and when you should call your provider if you notice warning signs. By the end of this article you’ll have a clear, actionable plan and the reassurance that you’re making the best choice for you and your baby.

Many readers tell us they’ve already enjoyed a cup or two before learning they were pregnant. It’s a common scenario, and the good news is that a single, low‑dose exposure is unlikely to cause catastrophic harm. Nevertheless, understanding the why behind the recommendation helps you feel empowered rather than anxious, and it equips you to discuss the matter confidently with your obstetrician.

What is sassafras tea?

Sassafras tea is brewed from the dried bark or roots of the Sassafras albidum tree, a plant native to North America that has been used for centuries in traditional medicine and as a flavoring agent in teas, root beers, and candies. The tea’s characteristic sweet‑spicy aroma comes from an essential oil rich in a compound called safrole. Historically, Native American tribes used sassafras for digestive ailments, fever, and even as a diuretic. Modern commercial teas often blend sassafras with other herbs to mellow the flavor, but the core ingredient remains the same: the bark or root that houses safrole.

Safrole is a naturally occurring phenylpropene that has been shown in animal studies to cause liver tumors at high doses. Because of this carcinogenic potential, the FDA banned the use of safrole as a food additive in 1960, and it remains a regulated substance in the United States. The agency also requires that any sassafras‑derived product sold as a dietary supplement contain less than 1 ppm (part per million) of safrole, a threshold that is hard to guarantee in home‑brewed or loosely regulated teas.

Beyond its flavor, sassafras was once a staple ingredient in traditional “root beer” preparations. Today, it appears in specialty herbal blends marketed for “relaxation” or “detox.” However, the presence of safrole means that any product labeled “sassafras tea” carries the same safety concerns, regardless of additional herbs or flavorings. The lack of standardized testing for safrole content in many boutique brands makes it difficult for consumers to know whether a particular cup meets the FDA’s 1 ppm limit.

For pregnant people, the concern goes beyond long‑term cancer risk. Safrole can cross the placenta and has been associated with developmental toxicity in rodents, including skeletal malformations and reduced fetal weight. While human data are limited, obstetric societies err on the side of caution. The ACOG Committee Opinion on herbal supplement use in pregnancy advises clinicians to discourage any herb containing known teratogens or hepatotoxins, and safrole falls squarely into that category. The NHS likewise lists sassafras among “herbs to avoid” for pregnant and lactating mothers, citing potential liver and fetal toxicity.

Is sassafras tea safe for pregnant women?

Beyond the carcinogenic concerns, safrole has been shown to interfere with enzymes involved in hormone metabolism, which could theoretically affect uterine contractility. While no large‑scale human trials have directly linked sassafras tea to miscarriage, case reports and small observational studies have raised enough alarm to prompt health agencies to advise complete avoidance.

Because the risk profile is not dose‑dependent in a well‑established way—meaning we cannot pinpoint a “safe” amount—most experts suggest treating any exposure as a “better‑safe‑than‑sorry” situation. The safest course is to discontinue use and choose a pregnancy‑approved herbal tea instead.

It’s also worth noting that safrole’s metabolic pathway can be influenced by genetic variations in the cytochrome P450 system. Some individuals metabolize safrole more slowly, leading to higher internal concentrations even after modest intake. This variability further supports the recommendation to avoid the herb entirely, rather than trying to calculate a “low‑risk” dose that might differ from person to person.

Finally, the lack of robust human data means that professional societies rely on a precautionary principle. When the evidence is ambiguous, the guidance from ACOG, the NHS, and the FDA is to err on the side of protection for the developing fetus. In practice, that translates to a clear “no” for any sassafras‑containing beverage, supplement, or culinary ingredient during pregnancy.

Sassafras tea safety in early pregnancy: what you need to know

The first trimester is the period of organogenesis, when the fetus’s major organs and structures are forming. During this window, substances that can disrupt DNA synthesis or cellular signaling pose the greatest teratogenic (birth‑defect‑causing) risk. Safrole, with its ability to form DNA adducts in animal models, falls into this high‑risk category.

Even a single cup of sassafras tea in early pregnancy could theoretically expose the developing embryo to safrole. While the absolute risk of a miscarriage from one cup is low, the lack of concrete safety data means that obstetric guidelines—such as those from the NHS and ACOG—recommend complete abstinence during the first 12 weeks.

If you discover you’ve already consumed sassafras tea before knowing you were pregnant, try not to panic. Most experts advise monitoring for any unusual symptoms (such as persistent nausea, abdominal pain, or jaundice) and informing your prenatal care provider at your next visit. They can order a liver function panel if they feel it’s warranted.

In addition to the teratogenic concerns, early pregnancy is a time when many people experience heightened sensitivity to herbal compounds. The liver, which processes safrole, is still adapting to the increased hormonal load of pregnancy, potentially amplifying any toxic effect. This physiological nuance reinforces the recommendation to avoid sassafras tea entirely during the first trimester.

Can I drink sassafras tea in my third trimester?

By the third trimester, the fetus has largely completed organ formation, but the liver and detoxification pathways are still developing. Safrole’s hepatotoxic (liver‑damaging) properties become a concern for both the mother and the baby. The FDA’s ongoing restrictions on safrole‑containing products apply throughout pregnancy, including the final months.

Additionally, some anecdotal reports suggest that high‑dose herbal teas can stimulate uterine activity, potentially leading to premature contractions. While there is no robust evidence that sassafras tea directly causes preterm labor, the precautionary principle upheld by ACOG and the NHS still advises against any consumption in the third trimester.

If you’re craving a warm, aromatic beverage late in pregnancy, consider swapping sassafras for a safer herbal tea that has been studied in pregnant populations, such as ginger or peppermint tea.

Another factor to consider is the increased blood volume and altered renal clearance that occur in late pregnancy. These changes can affect how quickly safrole is eliminated, potentially leading to higher systemic exposure from the same amount of tea that might be tolerated earlier in gestation.

Sassafras tea and liver health during pregnancy

The liver works overtime during pregnancy, processing both maternal and fetal waste products. Safrole’s known ability to induce liver enzyme elevation in animal studies raises a red flag for pregnant people, whose hepatic reserve may already be taxed. Elevated liver enzymes have been associated with conditions such as preeclampsia, making any additional hepatic stress undesirable.

While there are no large‑scale human studies linking occasional sassafras tea consumption to clinically significant liver disease in pregnancy, the FDA’s ban on safrole as a food additive reflects a consensus that the risk outweighs any benefit. If you have a history of liver disease, hepatitis, or elevated liver enzymes, avoiding safrole‑containing products becomes even more critical.

Sassafras tea and uterine activity

Some herbal compounds act as uterine stimulants, and safrole is thought to influence hormone pathways that could affect uterine contractility. Although direct evidence in humans is scarce, the theoretical risk of inducing Braxton‑Hicks‑like contractions or even true labor has led obstetric societies to recommend avoidance, especially in the later stages of pregnancy when the uterus is primed for delivery.

Women who have experienced preterm labor or who are at high risk for cervical insufficiency should be especially vigilant. In such cases, even minor uterine irritants could tip the balance toward an early contraction. Discussing any herbal tea consumption with your provider is a prudent step if you fall into a high‑risk category.

Safe dosage / amount / brands

Because the risk profile is not dose‑dependent in a well‑established way—meaning we cannot pinpoint a “safe” amount—most experts suggest treating any exposure as a “better‑safe‑than‑sorry” situation. The safest course is to discontinue use and choose a pregnancy‑approved herbal tea instead.

Below is a quick reference for the typical serving sizes found in commercial products and why none meet the safety threshold for pregnancy:

Because the safety issue is tied to the compound itself—not to a particular brand’s processing method—the consensus among obstetric professionals is to avoid all sassafras tea, regardless of labeling. If a brand claims it is “safrole‑free,” you would need a third‑party laboratory analysis to verify that claim, and such data are rarely publicly available.

Side effects and risks

While many people enjoy sassafras tea for its pleasant flavor, the side‑effect profile in pregnancy is not well‑studied. The most concerning potential outcomes include:

• Jaundice or dark urine: Signs of liver stress that should prompt immediate medical attention.
• Unexplained abdominal cramping: Could indicate uterine irritation or early labor.
• Nausea or vomiting beyond typical morning sickness: May reflect heightened sensitivity to safrole.
• Allergic reactions: Though rare, some individuals develop rash or itching after exposure.

Most of these symptoms are “red‑flag” signs that warrant a call to your obstetrician or a visit to urgent care. Minor, transient stomach upset is usually not dangerous, but it’s still wise to mention any new discomfort at your next prenatal appointment.

What are safe herbal tea alternatives for pregnancy?

1. Peppermint tea: Soothes nausea and is recognized as safe by the NHS.
2. Ginger tea: Excellent for morning‑sickness; Mayo Clinic endorses its use in moderation.
3. Raspberry leaf tea: Often recommended in the second and third trimesters for uterine tone, but start after 20 weeks.
4. Chamomile tea: Generally safe in small amounts; ACOG notes low‑dose use is acceptable.
5. Lemon balm tea: Calms anxiety without known fetal risks.
6. Rooibos tea: Caffeine‑free and rich in antioxidants; safe throughout pregnancy.
7. Nettle leaf tea: Provides iron and other minerals; safe when cooked and not taken in excessive amounts.
8. Dandelion root tea: Supports digestion and is considered low‑risk for pregnant people.

Related items — safety at a glance

Myth vs. fact

Myth: “A little sassafras tea is harmless because it’s a natural herb.”

Fact: Natural does not equal safe; safrole is a proven hepatotoxin and possible teratogen, so even small amounts cannot be guaranteed safe.

Myth: “If the tea smells good, it must be safe for my baby.”

Fact: Aroma is unrelated to toxicity. The chemical composition (safrole) is what determines risk, and that cannot be judged by scent.

Myth: “All herbal teas are safe during pregnancy because they’re sold over the counter.”

Fact: Many herbal teas contain compounds that are contraindicated in pregnancy; always check reputable sources like ACOG or the NHS.

Key takeaways

• ✅ Sassafras tea is not considered safe at any stage of pregnancy or while breastfeeding.
• ❌ No safe dosage has been established; avoidance is the only reliable recommendation.
• 🩺 Discuss any accidental exposure with your prenatal provider, especially if you notice liver‑related symptoms.
• 🌿 Choose proven‑safe alternatives such as peppermint, ginger, or rooibos tea for a comforting warm beverage.
• 📞 Call your doctor if you experience jaundice, severe abdominal pain, or any signs of premature labor.

Frequently asked questions

What teas are not safe during pregnancy?

Herbs such as sassafras, kava, pennyroyal, and dong quai are on the “avoid” list because they contain compounds that can be hepatotoxic or stimulate uterine contractions. The NHS and ACOG advise steering clear of these teas throughout pregnancy.

What herbs should pregnant women avoid?

Avoid herbs that include safrole (sassafras), pyrrolizidine alkaloids (e.g., comfrey), or uterine stimulants (e.g., dong quai, pennyroyal). These have been linked to liver damage, fetal toxicity, or increased miscarriage risk in medical literature.

Is sassafras tea legal to sell?

In the United States, the FDA bans safrole as a food additive, but sassafras‑flavored products can still be sold if they contain less than 1 ppm safrole. However, many herbal teas are not subject to this strict testing, so legality does not guarantee safety for pregnant consumers.

What are the benefits of sassafras tea?

Historically, sassafras tea has been used for digestive comfort, mild diuretic effects, and as a flavoring agent. Modern research, however, focuses more on its potential risks than on proven health benefits, especially for pregnant people.

Can sassafras tea cause miscarriage?

Direct human evidence is limited, but animal studies show that safrole can cause fetal abnormalities and uterine irritation, which theoretically could increase miscarriage risk. Because of this uncertainty, obstetric guidelines recommend complete avoidance.

What are the side effects of sassafras?

Common side effects include nausea, abdominal cramping, and, at higher doses, liver enzyme elevation. Rarely, allergic reactions or more serious hepatic injury can occur, prompting the FDA’s ban on safrole in food products.

Is safrole safe to consume?

No. Safrole is classified by the International Agency for Research on Cancer (IARC) as a probable carcinogen, and the FDA has prohibited its use as a food additive. Pregnant individuals should avoid any source of safrole, including sassafras tea.

Can I use sassafras flavoring in cooking while pregnant?

Because culinary sassafras flavoring typically contains the same safrole compound, the same avoidance recommendation applies. Even small amounts used in desserts or sauces cannot be guaranteed to stay below the 1 ppm threshold, so it’s safest to skip sassafras‑flavored foods entirely during pregnancy.

Is sassafras essential oil safe for pregnancy?

Essential oils are highly concentrated, and sassafras oil is especially rich in safrole. Health authorities such as the NHS advise pregnant people to avoid using sassafras essential oil topically or aromatically, as it can be absorbed through the skin and lungs, potentially reaching the fetus.

When to call your doctor

If you notice any of the following after drinking sassafras tea, contact your obstetric provider right away:

• Yellowing of the skin or eyes (jaundice)
• Dark‑colored urine or pale stools
• Severe or persistent abdominal pain or cramping
• Unusual bleeding or spotting
• Signs of preterm labor (regular contractions, pelvic pressure)
• Sudden, unexplained fatigue or dizziness

These symptoms could indicate liver strain, uterine irritation, or other complications that need professional evaluation. Remember, this article provides general information and is not a substitute for personalized medical advice.

References

1. American College of Obstetricians and Gynecologists. Committee Opinion No. 797: Use of Herbal Supplements During Pregnancy. 2022.
2. National Health Service (NHS). “Herbal medicines and pregnancy.” Updated 2023.
3. U.S. Food and Drug Administration. “Safrole – Food Additive Regulations.” 2021.
4. Centers for Disease Control and Prevention (CDC). “Herbal supplement safety.” 2022.
5. Mayo Clinic. “Ginger: Uses and benefits.” Accessed 2024.
6. World Health Organization (WHO). “Traditional Medicine Strategy 2014‑2023.” 2014.
7. International Agency for Research on Cancer (IARC). “Monographs on the Evaluation of Carcinogenic Risks to Humans – Safrole.” 2002.
8. British Medical Journal (BMJ). “Herbal medicine safety in pregnancy.” 2020.
9. National Center for Complementary and Integrative Health (NCCIH). “Herbal safety during pregnancy.” 2021.
10. European Medicines Agency (EMA). “Guideline on the safety of herbal substances in pregnancy.” 2022.