Last checked September 2026 against 10 sources · Editorial policy
Vitex (chasteberry) for perimenopause
Vitex, or chasteberry, has some evidence for PMS symptoms such as breast tenderness, but not for perimenopause. A randomized trial of St John's wort combined with vitex in late-perimenopausal and postmenopausal women found no benefit over placebo for hot flashes, menopause scores or mood. NCCIH says only a preliminary study suggests it might help menopause symptoms. There's no good evidence that vitex raises progesterone. It may not be safe with hormone-sensitive cancers.
Vitex has some evidence for PMS breast tenderness, but a perimenopause trial found no benefit over placebo. Progesterone claims, safety, and better options.
Vitex for perimenopause: expectation vs reality
What people often expect
“Vitex boosts progesterone and will fix my perimenopause symptoms”
What the evidence shows
The best perimenopause trial found vitex with St John's wort was no better than placebo; both groups improved over time, which shows the placebo effect. Claims that vitex raises progesterone aren't supported by the sources we reviewed. In perimenopause, falling progesterone reflects less frequent ovulation, which no herb has been shown to restore.
Vitex (chasteberry) and perimenopause: what studies show
What vitex (chaste berry) is
Vitex agnus-castus, or chasteberry, is the fruit of the chaste tree. Chasteberry extracts are promoted for PMS, breast pain, menopause and fertility. NCCIH says there isn't enough reliable evidence for sexual dysfunction or infertility, and chasteberry may be unsafe in pregnancy.
Vitex for PMS and breast tenderness
Some research suggests chasteberry might reduce PMS symptoms such as breast pain or tenderness, but NCCIH says higher-quality evidence is needed before firm conclusions. PMS-like symptoms can worsen in perimenopause, which is why vitex is often suggested then, though trials in perimenopause haven't shown benefit.
Learn more →Vitex for perimenopause: the trial
In a randomized, placebo-controlled trial, late-perimenopausal and postmenopausal women with hot flashes took St John's wort with vitex for 16 weeks. Ninety-three completed the study. There were no significant differences from placebo in daily hot flashes, Greene Climacteric Scale scores or depression scores at any point. Both groups improved, and the combination was well tolerated.
Does vitex increase progesterone?
Vitex is often marketed to raise progesterone, but the sources we reviewed don't show it does. In perimenopause, progesterone falls because more cycles skip ovulation. If you need progesterone, for example with estrogen HRT, prescription micronized progesterone is the proven option.
Learn more →Vitex and heavy bleeding
One low-quality study suggested chasteberry might reduce heavy bleeding caused by an IUD. That isn't evidence for heavy perimenopausal periods, which need a doctor's check. NICE recommends the levonorgestrel IUD as a first treatment for heavy menstrual bleeding in many women.
Learn more →Vitex side effects and safety
Chasteberry is generally well tolerated in the short term and has been used safely in studies for up to 3 months. Side effects are generally mild: nausea, stomach pain, diarrhea, headache or itching. It may not be safe for women with hormone-sensitive conditions such as breast, uterine or ovarian cancer, or during pregnancy or breastfeeding.
St John's wort in vitex combinations
Many perimenopause formulas pair vitex with St John's wort. St John's wort may help mild to moderate depression but weakens many medicines, including birth control pills, some antidepressants, warfarin and some heart and cancer drugs, and can cause skin reactions to sunlight in large doses. Check any combination product with your doctor.
Vitex by the numbers
16 weeks
93
3 months
0
The perimenopause trial tested vitex combined with St John's wort, not vitex alone.
Vitex and alternatives compared
Vitex (chasteberry) extract
Good for
Some evidence for PMS breast tenderness; well tolerated short term.Watch
No benefit shown in perimenopause; may not suit hormone-sensitive conditions.Vitex with St John's wort
Good for
Well tolerated in a 16-week trial.Watch
No better than placebo; St John's wort has many drug interactions.Prescription progesterone
Learn more →Good for
Proven to protect the uterus with estrogen HRT.Watch
Needs a prescription.Hormonal IUD
Learn more →Good for
First-line for heavy periods; also contraception.Watch
Needs insertion.
How to use vitex safely
- Avoid vitex if you've had breast, uterine or ovarian cancer, or are pregnant or breastfeeding.
- Check combination products for St John's wort if you take any medicine, including the pill.
- Limit use to about 3 months, the period with safety data.
When to talk to a doctor about vitex
Heavy or irregular bleeding in perimenopause
See a doctor rather than self-treating with herbs.
More →Hormone-sensitive cancer history
Talk to your oncology team before using vitex.
Low mood lasting two weeks or more
See a doctor; don't rely on St John's wort combinations without checking interactions.
More →
Vitex and perimenopause: questions women ask
Does vitex help perimenopause?
There's no good evidence it does. A trial of vitex with St John's wort in late-perimenopausal and postmenopausal women found no benefit over placebo for hot flashes, menopause scores or mood.
Does chasteberry increase progesterone?
The sources we reviewed don't show that it does. In perimenopause, progesterone falls because ovulation becomes irregular, and no herb has been shown to restore it.
Is vitex good for menopause?
NCCIH says only a preliminary study suggests chasteberry might help menopause symptoms, and more research is needed. It's better studied for PMS.
What are the side effects of vitex?
Usually mild: nausea, stomach pain, diarrhea, headache or itching. It may not be safe with hormone-sensitive cancers, or in pregnancy or breastfeeding.
Can vitex help PMS in perimenopause?
Some research suggests chasteberry may ease PMS symptoms such as breast tenderness, but higher-quality evidence is needed. A symptom diary over 2 cycles helps your doctor assess PMS.
Can I take vitex with birth control?
Check with your doctor. Vitex products often contain St John's wort, which can weaken birth control pills.
Does chaste berry help menopause?
Chaste berry, or vitex, hasn't shown benefit in menopause trials; NCCIH says only a preliminary study suggests it might help, and it's better studied for PMS.
Sources
- NCCIH. Chasteberry: usefulness and safety.
- van Die MD, Burger HG, Bone KM, et al. Hypericum perforatum with Vitex agnus-castus in menopausal symptoms: a randomized, controlled trial. Menopause. 2009;16(1):156-63.
- Hale GE, Zhao X, Hughes CL, et al. Endocrine features of menstrual cycles in middle and late reproductive age and the menopausal transition classified according to the Staging of Reproductive Aging Workshop (STRAW) staging system. J Clin Endocrinol Metab. 2007;92(8):3060-7.
- NHS. Utrogestan (micronised progesterone): about.
- NICE. Heavy menstrual bleeding: assessment and management (NG88).
- NCCIH. St. John’s wort: usefulness and safety.
- NHS. Heavy periods.
- NHS. Depression in adults.
- Women's Health Concern (British Menopause Society). Contraception for women over the age of 40. Fact sheet, 2025.
- NHS. PMS (premenstrual syndrome).
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