What NCCIH actually says about sea buckthorn

The National Center for Complementary and Integrative Health (NCCIH) is the federal agency within the U.S. National Institutes of Health (NIH) responsible for evaluating complementary, integrative, and herbal health approaches. It maintains some of the most-cited "Herb At-A-Glance" fact sheets in American consumer health, covering ginger, turmeric, echinacea, fenugreek, ginkgo, and dozens of others.

Sea buckthorn is conspicuously not on that list. As of our June 2026 review, NCCIH has no dedicated herb fact sheet for Hippophae rhamnoides, no published clinical-trial digest on sea buckthorn pregnancy outcomes, and no specific pregnancy-safety pronouncement on the supplement. If you searched "NCCIH sea buckthorn pregnancy" hoping to find a clear yes/no from the federal government, that's the unsatisfying truth: there isn't one.[2]

What NCCIH does provide is a consistent, well-documented framework for how to think about any unstudied herbal supplement during pregnancy. That framework is what most OB-GYNs, registered dietitians, and pharmacists actually apply when a pregnant patient asks about sea buckthorn — and it's what we'll work through in this article.

Why isn't there an NCCIH sea buckthorn page?

NCCIH publishes fact sheets primarily for herbs that meet at least one of three criteria:

  • High U.S. consumer use — herbs that show up frequently in NHANES dietary supplement surveys.
  • Significant safety signals or interactions — herbs with documented drug interactions or adverse-event reports.
  • NCCIH-funded clinical research — when the agency itself has supported trials, a digest typically follows.

Sea buckthorn currently sits in a gap: it has a moderate but rising U.S. consumer footprint (driven by omega-7 supplements and dry-eye research), no major adverse-event signals, and limited NCCIH-funded human trials. That combination means it hasn't yet hit NCCIH's publication queue — but it also doesn't mean the agency considers it "safe by default." The opposite is closer to the truth.

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Why this matters for SEO and consumers

People searching "NCCIH sea buckthorn pregnancy" often assume there's a hidden federal document with the answer. There isn't — and that itself is the most important fact. Absence of a clear regulatory statement is not the same as a green light.

NCCIH's general framework for herbs in pregnancy

Look across NCCIH's actual published fact sheets — ginger, fenugreek, sage, red clover, astragalus, cinnamon — and a striking pattern emerges. The agency uses almost identical wording for every herb whose pregnancy safety is uncertain:

"If you take any type of medicine, talk with your health care provider before using [the herb] or other herbal products; some herbs and medicines interact in harmful ways. The use of [the herb] dietary supplements during pregnancy [is/may be] [safe/unsafe/uncertain]. Little is known about whether it's safe to use [the herb] while breastfeeding." — Excerpted from NCCIH's Herbs At-A-Glance series

Applied to sea buckthorn, this framework tells us four things:

  1. The default position is caution, not approval. NCCIH does not designate herbs as "safe in pregnancy" unless there's substantial human evidence to that effect.
  2. The form matters. Dietary supplement doses are evaluated differently from culinary food amounts. A tablespoon of sea buckthorn berry on yogurt and a 3-gram daily oil capsule are not the same conversation.
  3. Drug interactions are a primary concern. Sea buckthorn has documented mild antiplatelet and blood-pressure-lowering effects, both of which can complicate pregnancy management.[3]
  4. The shared decision rests with the pregnant patient and her clinician — not with a website, a brand, or even NCCIH.

What the clinical evidence actually shows

Here is everything in the published literature directly relevant to sea buckthorn and pregnancy:

1. The 2018 teratogenicity study (Wen et al.)

The single most relevant safety study was published in Drug and Chemical Toxicology in 2018 (Wen P. et al., Guangxi Center for Disease Prevention and Control). Researchers fed pregnant rats sea buckthorn berry oil at three doses — 4.68 g/kg, 2.34 g/kg, and 1.17 g/kg body weight — daily from gestation day 7 through day 16 (the critical organogenesis window).[4]

0
Cases of treatment-related maternal toxicity at any dose
0
Cases of embryo toxicity or teratogenicity observed
4.68 g/kg
Highest tested dose — roughly 50× typical human supplementation by body weight

This is the closest thing to reassuring data we have. The authors concluded that sea buckthorn berry oil did not produce maternal toxicity, embryo toxicity, or developmental anomalies in rats — even at doses far exceeding what any human would consume.

The caveats are important: rat physiology is not human physiology, organogenesis windows differ between species, and this study did not test seed oil, leaf extracts, alcohol tinctures, or juice concentrates. Animal data raise our confidence; they do not replace human evidence.

2. The 2020 maternal supplementation study

A 2017 publication (later reanalyzed in 2020) compared maternal supplementation with cod liver oil, Nigella sativa oil, and sea buckthorn fruit during pregnancy and lactation in rats fed a high-fat diet. Sea buckthorn fruit supplementation was associated with protective effects on offspring liver and pancreas tissue, reduced oxidative stress, and improved metabolic markers compared with unsupplemented high-fat-diet controls.[5]

Again — interesting, mechanistically plausible, but not a human trial.

3. Drugs.com / Natural Products Database

The professional monograph at Drugs.com, which is the reference most U.S. clinical pharmacists consult, states unambiguously regarding sea buckthorn and pregnancy: "Avoid use. Information regarding safety and efficacy during pregnancy and lactation is lacking."[3] This mirrors what most state-funded herbal-safety reference centers (including the University of Texas at El Paso Herbal Safety database) advise.[1]

4. Human pregnancy clinical trials

There are none. As of June 2026, no randomized controlled trial of sea buckthorn supplementation in pregnant women has been published in any peer-reviewed indexed journal. This absence is itself the most important finding.

Why caution is warranted (even though sea buckthorn looks "natural")

"Natural" and "safe in pregnancy" are not synonyms. Several characteristics of sea buckthorn warrant pregnancy-specific caution, even setting aside the absence of human trials:

1. Mild antiplatelet activity

Sea buckthorn oil at 5 g/day has been shown to reduce platelet aggregation in non-pregnant adults.[3] In pregnancy, platelet function changes naturally, and bleeding risk increases around delivery. Adding a mild antiplatelet agent introduces unnecessary variability — and is the same reason most surgeons advise stopping sea buckthorn two weeks before any procedure.

2. Phytoestrogenic / hormonal modulation

The 2023 review in Frontiers in Endocrinology on sea buckthorn's role in female reproduction noted that the plant's flavonoids (isorhamnetin, quercetin, kaempferol) influence ovarian cell proliferation, apoptosis, and estrogen release.[6] In non-pregnant women, this may be beneficial (and is part of why sea buckthorn is studied for menopausal symptoms). In pregnancy, when hormonal balance is delicately maintained, this is precisely the kind of activity you don't want from an unstudied source.

3. Concentrated vitamin A precursors

Sea buckthorn berries are extraordinarily rich in carotenoids — including beta-carotene, lycopene, lutein, and zeaxanthin. Beta-carotene from food sources is not the same as preformed vitamin A (retinol) and does not carry the same teratogenic risk. However, very high carotenoid intake can cause carotenodermia (a harmless but visually striking orange skin tint), which has been documented in adults consuming around 100 g of sea buckthorn syrup daily for six months.[3] Pregnant women should not stack high-dose sea buckthorn supplements with multivitamins already containing vitamin A.

4. Mild blood pressure and blood sugar effects

Both have been documented in small adult studies. Both matter more in pregnancy, where blood pressure monitoring is routine and gestational diabetes screening is standard. Even mild, unaccounted-for effects can muddy a clinician's reading of your baseline.

Sea buckthorn forms in pregnancy: comparison table

Not all sea buckthorn products carry equal risk. Here's how they break down:

Form Typical Dose Pregnancy Status Rationale
Whole berry in food (jam, smoothie) 1–2 tbsp Likely OK Culinary amounts have been consumed safely in Asia and Europe for centuries.
Diluted juice (commercial blend) 30–60 ml/day With caution Vitamin C-rich; check label for added vitamin A and other herbs.
Oil capsules (oral supplement) 1–3 g/day Avoid Concentrated, no human pregnancy data, mild antiplatelet activity.
Concentrated juice/syrup 20–50 ml/day Avoid Risk of excess carotenoid load; unstudied in pregnancy.
Leaf extract / tincture Variable Avoid Different phytochemistry than berry; alcohol-based; least studied.
Topical oil (face, body) 2–4 drops With caution Minimal systemic absorption; patch test first; avoid abdomen.
Berry powder (smoothies) 5–10 g/day With caution Closer to whole food than concentrate; moderate amounts likely fine.

Trimester-by-trimester guidance

Pregnancy risk is not uniform across nine months. Here's how sea buckthorn supplementation maps to each stage:

1st
Weeks 1–13
Highest caution
Avoid supplemental doses entirely

Organogenesis happens in the first trimester. This is when most known teratogens cause the most harm. With no human data, supplemental sea buckthorn is not worth the unknown.

2nd
Weeks 14–26
Still avoid
Culinary OK; supplements no

Risk of structural malformation drops, but hormonal and metabolic effects still matter. Continue culinary use if you wish; skip the capsules and concentrates.

3rd
Weeks 27–delivery
Bleeding risk
Stop 2 weeks before delivery

If your clinician has approved any sea buckthorn use, discontinue at least 14 days before your due date because of mild antiplatelet effects. Earlier is safer.

Sea buckthorn during breastfeeding

An important clarification first: the NIH LactMed database (the gold standard for U.S. lactation-safety reference) includes an entry on "buckthorn" — but it refers to Rhamnus-genus buckthorns (European buckthorn, alder buckthorn, California buckthorn), which contain cathartic anthraquinones and are unsafe in breastfeeding. LactMed explicitly notes:

"Do not confuse these products with sea buckthorn [Hippophae rhamnoides]." — NIH LactMed Database, Buckthorn monograph

So Hippophae rhamnoides (true sea buckthorn) is not the same as the cathartic buckthorn LactMed warns against. That said, LactMed has no dedicated Hippophae rhamnoides entry, which again reflects the absence of specific lactation safety data.[7]

Practical guidance during breastfeeding:

  • Culinary amounts of berry, jam, or diluted juice are likely fine for most lactating women.
  • Concentrated oil supplements remain best discussed with a lactation consultant (IBCLC) or your physician — particularly in the first six weeks postpartum when both your hormonal regulation and your infant's metabolism are still stabilizing.
  • Topical sea buckthorn oil should not be applied to the nipple or areola where it could be ingested by the baby. Patch test first elsewhere.

I took sea buckthorn before I knew I was pregnant. What now?

This is one of the most-emailed questions to our editorial team, and the answer is reassuring:

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Don't panic — here's a measured response.

There is no documented evidence that occasional or short-term sea buckthorn consumption causes harm in early pregnancy. The animal data we have, while limited, showed no toxicity at doses far exceeding human supplementation. Most people who took a few weeks of oil capsules before discovering pregnancy will have no measurable consequence.

Here's what to actually do:

  1. Stop the supplement as soon as you confirm pregnancy. There's no benefit to "tapering."
  2. Note what you took, how much, and for how long. Brand, daily dose, and duration are the three details your OB-GYN will want.
  3. Mention it at your next prenatal appointment. Don't wait for them to ask — herbal supplements rarely appear on intake forms.
  4. Continue routine prenatal care. Don't add extra scans or testing unless your OB recommends it; there's no evidence base that would justify increased monitoring for this exposure.

Safe alternatives during pregnancy

If you were taking sea buckthorn for a specific reason, here are evidence-based, pregnancy-friendly substitutes to discuss with your OB-GYN:

  • For dry, itchy skin or stretch marks: Plain cocoa butter, shea butter, or fragrance-free moisturizers. Topical sea buckthorn oil itself is generally low-risk if patch-tested and avoided on the abdomen.
  • For omega-3 / heart support: Prenatal-formulated fish oil (DHA + EPA) is well-studied, recommended by ACOG, and far better evidenced than omega-7 in pregnancy.
  • For dry eye: Preservative-free artificial tears (PF drops) are first-line in pregnancy. Omega-3 fish oil also helps and has solid safety data.
  • For immune support / vitamin C: Whole oranges, kiwi, bell peppers, and strawberries provide ample vitamin C without concentrated herbal extracts. Your prenatal already covers most needs.
  • For GI / acid reflux: Pregnancy-safe options include small frequent meals, elevated head-of-bed, and (if your OB approves) calcium-based antacids — not herbal mucilage supplements.
  • For energy / fatigue: Address iron status (your prenatal labs will catch deficiency), prioritize sleep, and ask about a prenatal B-complex if your OB suspects need.

When can you start sea buckthorn again after birth?

This is highly individual, but the broad pattern most clinicians follow:

  • If you're not breastfeeding: You can typically resume sea buckthorn supplements once your postpartum bleeding (lochia) has fully resolved — usually 4–6 weeks postpartum. Wait until your six-week postpartum check-up and clear it with your provider, particularly if you had any postpartum complications, are on antidepressants, or are still on prescribed pain medication.
  • If you're breastfeeding: Discuss with an IBCLC or your physician before starting any concentrated supplement. Culinary amounts of berry or diluted juice are generally fine well before that. Once you decide to start, our dosage calculator includes a slow ramp-up protocol that's particularly appropriate for the postpartum window.

How to talk to your OB-GYN about sea buckthorn

OB-GYNs hear "I read on a website…" constantly. Walking in with specific, written information dramatically improves the quality of the conversation. Bring this:

Pre-appointment checklist

  • The exact product name and brand you're considering or were taking (label photo on your phone works).
  • The form (oil capsule, juice, topical, food).
  • The dose per serving and total daily intake in grams or milliliters.
  • Why you wanted to take it — specific symptom or goal (dry eye, skin, energy, etc.).
  • How long you've been taking it (or planning to).
  • Your full medication list — including prenatal vitamin, low-dose aspirin if prescribed, and any over-the-counter products.
  • Any history of bleeding disorders, hypertension, or gestational diabetes in this or previous pregnancies.
  • A note that NCCIH does not currently publish a sea buckthorn pregnancy fact sheet (this signals you're an informed patient, not someone repeating viral health claims).
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Key takeaways

1. NCCIH does not publish a sea buckthorn fact sheet — but their general herbal-pregnancy framework strongly favors caution.

2. No human pregnancy trials on sea buckthorn supplements exist as of 2026.

3. Animal teratogenicity data is reassuring at doses far above human use, but doesn't establish safety.

4. Culinary amounts are likely fine; concentrated supplements should be avoided unless cleared by your OB-GYN.

5. Topical use is low-risk but unstudied — patch test, avoid the abdomen, and don't apply near nipples while nursing.

Frequently asked questions

The National Center for Complementary and Integrative Health (NCCIH) does not currently publish a dedicated fact sheet on sea buckthorn (Hippophae rhamnoides). However, NCCIH's consistent guidance across all herbal supplements is that pregnancy safety must be established by human evidence, which does not yet exist for sea buckthorn. The default position is therefore caution and consultation with your health care provider before use.

Diluted commercial sea buckthorn juice in modest amounts (30–60 ml per day, ideally as part of a blended product) is generally considered low-risk during pregnancy. Concentrated juice or syrup (the kind sold by Asian herbal pharmacies in 200–500 ml bottles) is best avoided due to the carotenoid load and absence of pregnancy data. Always check the label for added vitamin A, other herbs, and alcohol.

Topical sea buckthorn oil is generally considered low-risk because skin absorption of the active compounds is minimal. However, no formal pregnancy-specific topical safety studies exist. Sensible precautions: always patch-test on the inner forearm first (24–48 hours), avoid applying to the abdomen, and avoid the nipple/areola area if you'll be breastfeeding. If you have a history of sensitive skin or contact dermatitis, skip it.

Almost certainly not. The only published animal teratogenicity study (Wen et al., 2018) found no maternal or embryo toxicity at doses up to 4.68 g per kg of body weight during the rat equivalent of the first trimester. In human terms, a few weeks of standard 1–2 g daily oil capsules taken before pregnancy confirmation has no documented harm. Stop the supplement, mention it at your next prenatal visit, and continue routine care.

The NIH LactMed database has no specific entry for Hippophae rhamnoides, but explicitly notes that "sea buckthorn" should not be confused with cathartic Rhamnus-type buckthorns (which are unsafe in lactation). Culinary use of true sea buckthorn berries is likely fine; concentrated oil supplements during breastfeeding are best discussed with a lactation consultant or your physician, particularly in the first six weeks postpartum.

There is no documented evidence that sea buckthorn causes miscarriage in humans. Some herbal-practitioner sources speculate about possible mild uterine-stimulating effects from its flavonoids, but this has not been demonstrated in clinical studies. The cautious approach during pregnancy is precautionary, not based on documented miscarriage risk.

No — sea buckthorn is not an evidence-based morning-sickness treatment. The best-studied complementary options are ginger (NCCIH has a dedicated fact sheet on it and considers it likely safe in pregnancy at typical doses) and vitamin B6 (pyridoxine). Discuss with your OB-GYN before trying any supplement for nausea.

No — and this is a critical clarification. LactMed warns about Rhamnus-genus buckthorns (European, alder, California buckthorn) because their bark and stems contain cathartic anthraquinones that can pass into breast milk and cause loose stools in infants. Hippophae rhamnoides (sea buckthorn) is a completely different plant from a different botanical family. The shared common name is unfortunate but biologically meaningless. LactMed itself notes the distinction explicitly.

Possibly not — sea buckthorn is not yet a mainstream supplement in U.S. obstetric practice, and most OB-GYNs train on a small set of well-known herbs (ginger, raspberry leaf, evening primrose, fenugreek). Walk in prepared with the product label, your dose, and a printed reference. If your OB defers to a pharmacist or maternal-fetal medicine specialist, that's appropriate — and a sign you're being well cared for.

Sources & references

  1. University of Texas at El Paso, Herbal Safety Database. "Sea Buckthorn — Pregnancy and Lactation." utep.edu/herbal-safety
  2. National Center for Complementary and Integrative Health (NCCIH), NIH. "Herbs at a Glance" series and Clinical Digest publications. nccih.nih.gov
  3. Drugs.com Natural Products Database. "Sea Buckthorn — Professional Monograph." drugs.com/npp/sea-buckthorn
  4. Wen P., Zhao P., Qin G., Tang S., Li B., Zhang J., Peng L. (2018/2020). "Genotoxicity and teratogenicity of seabuckthorn (Hippophae rhamnoides L.) berry oil." Drug and Chemical Toxicology, 43(4):391–397. PubMed
  5. Maternal supplementation comparative study (cod oil, Nigella sativa, sea buckthorn fruit) — protective effects on offspring from high-fat-diet dams. ResearchGate publication, 2017/2018 reanalysis.
  6. Mihal M., Roychoudhury S., Sirotkin A.V., Kolesarova A. (2023). "Sea buckthorn, its bioactive constituents, and mechanism of action: potential application in female reproduction." Frontiers in Endocrinology, doi:10.3389/fendo.2023.1244300. PMC10662087
  7. NIH National Library of Medicine — Drugs and Lactation Database (LactMed®). "Buckthorn" monograph (with clarification on Hippophae rhamnoides). NBK501858
  8. American College of Obstetricians and Gynecologists (ACOG). Practice guidance on dietary supplements and herbal products in pregnancy. ACOG Committee Opinions, current editions.
Medical disclaimer: This article is for educational and informational purposes only. It is not medical advice, does not establish a clinician–patient relationship, and does not replace consultation with a licensed healthcare professional. Pregnancy is a uniquely individual medical state — guidance that applies to most pregnancies may not apply to yours. Always speak with your OB-GYN, midwife, or maternal-fetal medicine specialist before starting, stopping, or changing any supplement, including sea buckthorn. Sea buckthorn is regulated as a dietary supplement in the United States under DSHEA; it is not FDA-approved to diagnose, treat, cure, or prevent any disease. Read our full side effects and interactions guide →