How does dong quai work? What the science says

Dong quai (Angelica sinensis) is a root used for centuries in traditional Chinese medicine, above all for women's complaints. As for "how it works", the honest answer is: there is no confirmed mechanism in humans. There are proposed mechanisms — compounds in the root with an affinity for oestrogen receptors, anti-inflammatory and antioxidant effects observed in the laboratory — but the clinical evidence in women is weak and, in places, contradictory.

What can be said more firmly is what the trials do not show: in a systematic review of 30 randomised controlled trials on oral herbal supplements not derived from soy for menopausal symptoms, 28 trials reported improvements in symptoms, but the two trials that used vitex and dong quai found no measurable effects ¹. An earlier systematic review, which identified 18 randomised trials of herbal products for menopausal symptoms, included only one trial with dong quai ². In other words: the evidence base is narrow, and that is what this article explains in detail.

What is known about dong quai's mechanism of action

The root contains several compounds that have been studied, including ligustilide, 3-n-butylphthalide and ferulic acid. A systematic review on the therapeutic potential of Angelica sinensis describes, for these extracts and active compounds, anti-inflammatory, antioxidant, antiplatelet and anti-atherosclerotic effects, as well as effects on the formation of blood vessels and neurons — but these data come mainly from experimental models in the context of ischaemic stroke, and not from studies in healthy women taking dong quai orally ³.

This matters for interpreting everything that follows: what happens in a laboratory dish or in an animal model does not automatically translate into effects in the human body. The amount that reaches the circulation, the metabolism and the dose change the outcome.

The phytoestrogen hypothesis

One popular explanation is that dong quai would act as a phytoestrogen, binding weakly to oestrogen receptors. It is a biochemically plausible hypothesis, but there is not enough human data to state that the root behaves like a selective oestrogen receptor modulator in a woman's body. Treat this idea as a proposed mechanism, not as an established fact.

Does dong quai work for hot flushes and night sweats?

It is the most frequent question and the answer is: the available evidence does not support a clear effect. In the systematic review with a search in October 2025, which assessed neurological symptoms, sleep quality and vasomotor symptoms in 30 randomised trials, 28 trials reported improvements, but the two trials with vitex and dong quai showed no measurable effects ¹. An older systematic review, focused on herbal products for menopausal symptoms, identified 18 randomised trials, including only one trial with dong quai ².

There is, however, one trial that deserves context: a randomised, double-blind, placebo-controlled study in 50 healthy pre- and postmenopausal women, aged between 44 and 65, tested a multi-herb formula — including dong quai, vitex, milk thistle, red clover, American ginseng and allspice — for 3 months. In a small study (50 women) with a six-herb formula, the formula group reported a significantly greater average reduction in symptoms, with a 73% decrease in hot flushes and a 69% decrease in night sweats after 3 months ⁴. Note: this result is from a six-herb formula, not from dong quai alone, and the study is small (50 women). It does not allow the effect to be attributed to dong quai.

There is also a trial designed specifically to compare alternative approaches for the menopause, which included an arm with a multi-botanical containing dong quai (among other plants, such as vitex, alfalfa, allspice, liquorice and oats), four capsules a day ⁵. The design confirms what is already known: dong quai is rarely studied on its own, which makes it difficult to isolate its contribution.

What the evidence does and does not allow us to conclude

Question	What the evidence shows
Does dong quai alone reduce hot flushes?	There is no consistent support; the trials with dong quai included in systematic reviews showed no measurable effects 1.
Do multi-herb formulas (including dong quai) help?	One trial in 50 women over 3 months showed reductions in hot flushes and night sweats, but the effect cannot be attributed to dong quai 4.
Is there a known mechanism in humans?	Not confirmed; the mechanisms described come mainly from experimental models 3.
Is it for infertility, endometriosis or regulating the cycle?	There is no clinical evidence to support this

If your goal is to understand whether it makes sense for you, it is also worth reading our analysis of dong quai benefits and what it is used for, where we go deeper into the traditional uses and what has been tested.

What doses were used in the studies (and what the label says)

There is no official dose of dong quai. The studies that exist use heterogeneous amounts and, often, in the form of formulas with other plants, which makes comparisons difficult. Study doses are not instructions for taking it: they only serve to give scale.

For reference, the older studies with dong quai used amounts ranging from 1 to 4 grams of dried root per day, or equivalent standardised extracts — but without universal standardisation, it is difficult to compare products. Female Balance Gummies provide 100 mg of extract per serving of 2 gummies; that dose is considerably lower than the amounts used in some trials, which does not mean it is insufficient or sufficient — only that the numbers are not directly comparable.

To have a concrete label reference: TuttiBear's Female Balance Gummies provide 100 mg of dong quai extract per serving of 2 gummies, in a total of 60 gummies per pack, to be chewed 2 per day preferably after a meal. The formula also includes maca (black and yellow), shatavari extract, saffron extract, zinc citrate, vitamin B6 and vitamin D3. As with any supplement, the recommended daily dose should not be exceeded.

If you want to compare formats before deciding, we have a dedicated article on dong quai gummies or tablets, and another on what the recommended daily dose is.

If you are unsure about the best time of day to take it, we also have an article on when to take dong quai.

Why it is so difficult to know "whether it works"

There are three obstacles that explain the uncertainty. The first is the lack of trials with dong quai alone: in systematic reviews, dong quai almost always appears within multi-botanical formulas, which makes it impossible to attribute effects to a specific ingredient ^{2 5}. The second is the variability of products: the concentration of marker compounds varies between extracts and batches, which means that two people taking "dong quai" may be taking different things. The third is the size of the studies: small samples, such as the 50 women in the trial with the six-herb formula, generate results that need confirmation ⁴.

None of this means that the root is useless — it means that science has not yet been able to demonstrate robustly what tradition attributes to it.

Safety, interactions and who should avoid it

Dong quai is not risk-free. The review on Angelica sinensis describes antiplatelet effects among the mechanisms identified for its compounds ³, which raises a theoretical concern about interaction with anticoagulants and antiplatelet medicines. If you take anticoagulant or antiplatelet medication, or have a chronic illness, talk to a healthcare professional before consuming it. We have a specific article on dong quai and medicine interactions.

The warnings on the label of Female Balance Gummies themselves state that the product is not recommended for pregnant or breastfeeding women and that, in case of illness or taking medicines, a healthcare professional should be consulted before consuming it. It contains polyols, whose excessive consumption may have laxative effects. These precautions are consistent with the usual prudence with plants with a traditional hormonal use: pregnancy, breastfeeding, children and adolescents, medication and illness are situations in which you should speak to a healthcare professional first.

There are also two precautions that tradition and clinical practice associate with this root: it may increase sensitivity to the sun (photosensitivity) and cause allergic reactions in some people. People with hormone-sensitive conditions — such as breast, uterine or ovarian cancer — should avoid dong quai, given its potential oestrogenic effect, and the same applies to those undergoing hormone therapy. Children and adolescents should not take it without medical guidance.

When it may make sense and what to expect

If you are considering dong quai, adjust your expectations to what the evidence allows: there is no guarantee of an effect on hot flushes, night sweats, cramps or cycle regularity, and the trials that included dong quai showed no measurable effects ¹. You should also not expect an immediate effect — the trials with formulas that included the plant ran over months, not days ⁴.

If your focus is female hormonal wellbeing, you can explore our Women's Health collection. And if you are looking for ingredients with more consolidated evidence for other goals, such as rest, see how magnesium works — a mineral with authorised health claims in the EU, unlike botanicals, whose claims are on hold (not authorised) ⁶.

In summary: dong quai has a long history of use and interesting proposed mechanisms, but the scientific answer to the question "how does it work?" remains "we do not know for certain, and the available trials do not show clear effects". Deciding to take it is a personal choice that should be informed, with products that state the dose on the label and, ideally, with the opinion of a healthcare professional.

Frequently asked questions

Does dong quai work for menopausal hot flushes?

The available evidence does not support a clear effect. In a systematic review of 30 randomised trials on oral herbal supplements for menopausal symptoms, 28 trials reported improvements in symptoms, but the two trials that used vitex and dong quai found no measurable effects. One trial with a six-herb formula, including dong quai, showed reductions in hot flushes and night sweats, but the effect cannot be attributed to dong quai alone.

What is dong quai's mechanism of action?

There is no confirmed mechanism in humans. The root's compounds, such as ligustilide and ferulic acid, have shown anti-inflammatory, antioxidant and antiplatelet effects in experimental models, mainly in the context of ischaemic stroke. The hypothesis that it acts as a phytoestrogen is plausible, but it has not been demonstrated in women.

Is dong quai safe? What can it interact with?

Among the mechanisms described for its compounds is an antiplatelet effect, which raises a theoretical concern about interaction with anticoagulants and antiplatelet medicines. It is not recommended for pregnant or breastfeeding women. In case of illness or taking medicines, you should consult a healthcare professional before consuming it.

How much dong quai should I take per day?

There is no official dose and studies use heterogeneous amounts, often in formulas with other plants. Study doses are not instructions for taking it. What you can do is check the dose stated on the label of the product you choose and follow the manufacturer's instructions, without exceeding the recommended daily dose.

Is dong quai for infertility or for regulating the menstrual cycle?

There is no clinical evidence to support these uses. Chinese tradition uses the root to "nourish the blood" and regulate the cycle, but the available trials do not demonstrate effects on fertility, endometriosis or cycle regularity. If you have difficulty conceiving or very irregular cycles, talk to a healthcare professional.

Why are studies on dong quai so inconclusive?

For three main reasons: dong quai is almost always studied within multi-botanical formulas, which makes it impossible to attribute effects to one ingredient; the concentration of active compounds varies between extracts and batches; and the existing trials have small samples, which generate results that need confirmation.