Berries and juice in normal food amounts: fine, and traditional for centuries. Concentrated oil supplements during pregnancy or breastfeeding: never tested in people, so human safety is unknown, which means skip them or clear them with your doctor first. One animal study dosed pregnant rats through organ formation and saw no harm to the mothers or the embryos, and a rat result does not license a human dose. Any page promising you a more confident answer is guessing.
Why “unknown” is the accurate word
Pregnancy is the one population supplement trials almost never enroll, for good ethical reasons. Sea buckthorn is no exception: not one human trial has tested it in pregnant or breastfeeding women. That does not mean nobody has studied it at all. One animal study did, and the next section walks through it. What we still lack is human data, so harm is not known and safety is not known, and those are very different situations from the rest of this site’s evidence. Across everything we have graded for women, this is the page with the least human evidence to work with, and that is the finding.
What the one animal study actually shows
There is one published safety study, and it is in animals, not people. Researchers dosed pregnant rats with sea buckthorn berry oil across the main organ-forming window, gestation days 7 to 16, at three levels: 1.17, 2.34, and 4.68 grams per kilogram of body weight. They reported no treatment-related maternal toxicity and no embryo toxicity, and a companion set of tests in bacteria and mice found the oil was not genotoxic (PMID 30081653). The work came out of two government toxicology labs in China rather than a supplement company, so nobody was selling anything with it. It is a clean result, and it belongs on the page instead of pretending nothing exists.
Here is why it does not move the advice. It is a rat study, and rat pregnancy is not human pregnancy, so a clean animal result does not license a human dose. It tested the berry oil itself, not the specific softgel on your shelf. And it stopped where it stopped: the dosing ran to gestation day 16 and no further, so the study says nothing about the last stretch of pregnancy, about delivery, about the newborn weeks, or about what crosses into milk. That last gap matters here, because this page covers breastfeeding too. We grade animal data as preliminary, the second-lowest tier on this site, and preliminary safety data is a reason to keep watching, not a green light. So the honest read is narrow. No rat harm during organ formation, no human trials at all, and the default below is unchanged.
What “unstudied” means, precisely
Unstudied here means unstudied in people, and the rat data above does not change that. It does not mean probably safe, and it does not mean probably dangerous. The human experiment has not been run, and for pregnancy it never will be, because ethics boards do not approve dosing pregnant women with supplements that carry no human safety record, and that record is the thing we are missing. So the honest response to an unfillable gap is a default, rather than a guess: food exposures stay, because they carry centuries of real-world use, and concentrated novel exposures wait. That is the entire logic, and it is the same logic your own clinician will use.
What traditional use does and does not say
Women in Tibet, Mongolia, and Siberia have eaten these berries for centuries, through pregnancies included. That long food record is genuinely reassuring about food. But traditional use involved berries and juice, not 2 to 3 grams a day of concentrated oil softgels, a dose form invented decades ago, not centuries. Tradition cannot vouch for a product that did not exist in tradition.
What “food amounts” actually means
The phrase needs a ruler, so here it is. Food amounts are a spoon of jam, a small glass of juice cut with water, a mug of berry tea, a handful of fresh or frozen berries when you can find them. These are servings, not doses, and they come with a genuine nutrient bonus: the berry is among the richest common fruit sources of vitamin C, detailed on the vitamin C page. A 1 to 3 gram oil supplement is a different category of exposure, many times anything the kitchen delivers, and that category is the one with zero human pregnancy data.
The trimester view
The first trimester is organ construction, the window where caution matters most and where even many prescription drugs are paused or swapped. It is also the window where nausea edits most diets anyway, and the straight juice is intensely sour, which settles the craving question for many women on its own. Through the second and third trimesters the math does not change: food stays fine, supplements stay paused. What grows instead is the skin question, because a stretching belly is exactly where topical sea buckthorn oil gets discussed, and that lane is next.
Skincare during pregnancy
Topical oil is a lower-exposure category: very little of what you smooth on skin reaches the bloodstream, and what reaches the baby is less again. Patch test on the inner arm first, since pregnancy can rewrite skin reactivity, and expect comfort rather than miracles. The stretch marks page grades what topical oil can and cannot do there, and the short version is: pleasant moisturizer, unproven eraser. If you are choosing between a jar and a bottle, our cream page explains which creams carry enough oil to matter and which ones only wear the ingredient on the front label. Skip the oral “beauty from within” capsules for now, because those are the supplement category wearing a skincare costume. Your midwife or doctor outranks any website, including ours, so run the bottle past them at the next visit if you want a second vote.
Our recommended line
- Food amounts: berries, diluted juice, jam. Enjoy normally.
- Oil supplements and capsules: pause until after breastfeeding, unless your own doctor, who knows your history, says otherwise.
- Skincare: topical products are a lower-exposure category, and the standard patch-test-plus-common-sense approach applies. When in doubt, your midwife or doctor wins over any website, including ours.
A script for the visit
If you want a real answer for your specific case, bring the actual product to your next appointment and say: “I have been using this. Here is the dose. Is there anything in my history that makes it a bad idea?” That is a two-minute conversation for someone who knows your blood pressure, your medications, and your scan results, and it settles the question with authority no website can match, ours included. If the answer is “wait until after weaning”, the wait is months, and the oil will still exist then. The breastfeeding page picks up the same logic for the months after delivery, where the answer barely changes.
When to restart
After weaning, the supplement question returns to normal rules: the evidence on the benefits hub applies, the dosage page shows studied amounts, and the safety hub covers interactions. If you arrived here from the menopause page by way of family planning, those pages will wait for you.
Frequently asked questions
Can you take sea buckthorn while pregnant?
No human trial has studied sea buckthorn oil supplements in pregnant or breastfeeding women, so safety in people is simply unknown. The only pregnancy data comes from one animal study, in which rats dosed with the berry oil across the organ-forming window showed no maternal or embryo toxicity, and a rat result does not transfer to a human dose. The conservative, standard advice: berries and juice as food are fine in normal food amounts, but skip the concentrated oil supplements until after breastfeeding, or clear them with your doctor.
Can I use sea buckthorn oil on my skin while pregnant?
Topical use is a lower-exposure category than swallowing capsules, since very little of a skin oil reaches the bloodstream. A patch test first is standard sense, and many pregnant women use the oil on stretching skin without issue, though no trial has formally studied it. When in doubt, your midwife or doctor outranks any website, including ours.