Dong quai is one of the most famous women’s herbs in Chinese medicine. Here’s what it is, how it’s traditionally used, what the research actually shows, and the safety points to know before you take it.
Dong quai (Angelica sinensis, called dang gui in Chinese) is the root of a plant in the celery family, used for more than 2,000 years in Traditional Chinese Medicine, mainly for women’s health. It’s sometimes called “female ginseng.” Dong quai benefits for women are traditionally said to include more regular periods, easier cramps and support during menopause. But good scientific evidence for dong quai on its own is limited, and it has real safety issues when swallowed, especially with blood thinners and in pregnancy.
What is dong quai?
Dong quai is a fragrant root, sold dried, sliced or powdered, in capsules, teas, tinctures and in many Chinese herbal formulas. It contains natural compounds including ferulic acid, essential oils and coumarins. In TCM it’s classified as a herb that nourishes the blood and helps it move, which is why it became central to women’s care.
How Traditional Chinese Medicine uses dong quai
In TCM, dong quai is rarely used alone. It’s combined with other herbs that balance it, in formulas matched to a woman’s pattern. Some classic examples:
- Si Wu Tang (Four Substances Decoction), the best-known blood-nourishing formula, built around dong quai.
- Dang Gui Shao Yao San, from the classic Jin Gui Yao Lue, traditionally used for abdominal discomfort in women.
- Wen Jing Tang (Warm the Menses Decoction), also from the Jin Gui Yao Lue, traditionally used for cold-type irregular or painful periods.
Traditionally, dong quai is used for scanty or late periods, cramps with a feeling of cold, a pale complexion and tiredness, patterns TCM calls blood deficiency and blood stasis. These are traditional uses, not proven treatments.
Dong quai benefits: what the evidence shows
- Irregular periods: no good-quality trials of dong quai alone.
- Menstrual cramps: small studies, mostly of combination formulas. Not enough to draw firm conclusions.
- Menopause: in a 1997 double-blind trial, 71 postmenopausal women with hot flashes took dong quai alone or a placebo for 24 weeks. Dong quai was no better than placebo for hot flashes or other menopausal symptoms. Studies of combination products have mixed results.
- “Blood building” and anemia: a traditional use, not shown in clinical research.
One reason for the gap: TCM almost never uses dong quai by itself, but most Western studies test it alone. Formula studies are more relevant but often small or of limited quality. The honest summary is that dong quai has a long traditional history and too little good evidence to recommend it as a treatment.
Dong quai safety: when taken by mouth
- Blood thinners. Dong quai contains coumarin compounds. Case reports describe dangerously increased warfarin effects and bleeding. Don’t combine dong quai with warfarin or other blood thinners without your doctor.
- Surgery. Stop at least two weeks before planned surgery because of the possible bleeding risk.
- Pregnancy. Avoid. Dong quai affects the uterus, and one study linked a first-trimester herbal combination containing it to birth defects.
- Breastfeeding. Avoid; there’s not enough safety information.
- Sun sensitivity. It contains psoralens, which can make skin more sensitive to sunlight.
- Hormone-sensitive conditions, such as some breast cancers, endometriosis or fibroids. Research on its hormone effects is mixed, so ask your doctor.
- Long-term, high doses are considered possibly unsafe.
- Common side effects include burping and gas.
If you’re considering dong quai, talk to your doctor or a qualified TCM practitioner, especially if you take any medicines.
When to see a doctor instead
Herbs shouldn’t delay a check for:
- cycles shorter than 21 days or longer than 35 days, or no period for three months
- heavy or prolonged bleeding, or bleeding between periods
- severe period pain
- hot flashes or bleeding changes after 45
See How to Regulate Periods Naturally and Anovulatory Cycle for the common causes of irregular periods.
Dong quai worn, not swallowed
There’s another way to use dong quai, one with roots in the same tradition. Applying herbs over the navel, the acupoint TCM calls Shenque, is a long-standing external method; see Belly Button Therapy and Navel Oiling for its history and evidence. CycleBalance, our pouch for irregular period timing, includes dang gui (dong quai) with other classical herbs, sealed in a fabric pouch worn over the navel. Nothing is swallowed or brewed.
External use avoids swallowing the herb, but it doesn’t prove safety. There is little reliable information on dong quai’s safety on the skin, and external application doesn’t establish pregnancy safety or freedom from medication interactions. So the same care applies:
- If pregnancy is possible, check before starting. Stop if pregnancy is suspected or confirmed.
- Review use with your clinician if you’re breastfeeding, receiving medical or fertility treatment, or managing an ongoing condition.
- Check with your clinician first if you have, or have had, breast cancer or another hormone-sensitive condition, endometriosis or fibroids, or use hormone therapy.
CycleBalance is not a treatment for PCOS, thyroid disease or another cause of irregular periods. In Dr. Wang’s practice records from 2016 to 2022, seven women with irregular cycles used the CycleBalance formula. These were selected, uncontrolled cases, so they cannot show what caused any change or predict your result.
See CycleBalance’s directions →
Quick answers
Is dong quai the same as estrogen?
No. It isn’t a hormone, and in the 1997 placebo-controlled trial, dong quai alone didn’t produce estrogen-like effects on the uterine lining or vaginal cells. It doesn’t replace hormone therapy.
Can dong quai regulate periods?
It’s traditionally used for this, but there’s no good evidence that dong quai alone regulates periods.
How long does dong quai take to work?
Traditional formulas are usually taken over several cycles, but there’s no evidence-based timeline for dong quai alone.
Reviewed October 2026. Author: Qingcai Wang, MD, PhD, developer of the Five Essences external herbal-pouch formulations, with a commercial interest in their sale. General education only; continue your medical care.
Sources: Hirata JD et al. Does dong quai have estrogenic effects in postmenopausal women? A double-blind, placebo-controlled trial. Fertil Steril (1997); Page RL, Lawrence JD. Potentiation of warfarin by dong quai. Pharmacotherapy (1999); Chinese herbal medicine and warfarin interactions, Singapore Medical Journal (2015).
The routine behind this article
CycleBalance is the Five Essences external herbal pouch matched to this topic — worn on the body, nothing swallowed. One course is six pouches (about 30 days), with a fresh pouch every five days. $199 per course; the reusable belt is $15 if you don’t have one. Every first course is covered by the 90-Day First-Course Satisfaction Guarantee.
Wellness support, not medical care.
This article is part of our Women’s Core Health guide — cycle, fertility and postpartum, in one place.