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Best Vitex (Chasteberry) Supplements for Menstrual Cycle Comfort (2026)
Vitex agnus-castus is one of the better-evidenced women's herbs for premenstrual comfort and cyclic breast tenderness. The Schellenberg 2001 BMJ trial of 170 women showed 52% responders on 20mg/day Ze 440 vs 24% on placebo across three cycles, replicated in He 2009 and supported by the van Die 2013 systematic review. The catch is standardization: most positive trials used either Ze 440 (Zeller, Switzerland) or BNO 1095 (Femicur, Bionorica), and US OTC products vary widely in extract type and active compound load. We scored 7 products with primary weight on standardization to the trial-form spec, plus dose match, third-party testing, and value across a full 3-cycle trial.
See the full Vitex (Chasteberry) scorecard →What the Evidence Says About Vitex (Chasteberry)
How A-F grades work- APremenstrual symptom relief (irritability, mood changes, breast tenderness, headache)
- ACyclical breast tenderness (cyclic mastalgia)
- BPremenstrual dysphoric disorder (PMDD)
- CMild hyperprolactinemia and luteal phase support
- DMenopausal hot flashes and vasomotor symptoms
- FAcne and androgenic skin issues
- DFertility in healthy women without identified hormonal issue
A = strong RCT evidence · B = moderate · C = limited · D = weak · F = no evidence.
Our Top Picks
Vitex Chasteberry 400mg, 100 VegCaps
$0.16/day at effective dose
Detailed Reviews
Femaprin Vitex Extract with Vitamin B6, 60 Capsules
Standardized vitex agnus-castus fruit extract (40mg) + 5mg vitamin B6, vegetarian capsule | 40mg/serving | 60 servings
Femaprin is the most clinically credible vitex product widely available in the US, and the once-daily standardized format matches how the trial-quality evidence was generated
Check Price on Amazon →Chaste Tree (Vitex) 225mg, 120 Capsules
Vitex agnus-castus fruit extract (4:1 concentration), hypoallergenic vegetarian capsule | 225mg/serving | 120 servings
Best option for people with sensitivities or who want a clean-label, allergen-free formulation; the long supply also makes a full 3-cycle trial straightforward
Check Price on Amazon →Chaste Tree Berry Extract, 60 Capsules
Vitex agnus-castus berry extract 225mg, vegetarian capsule | 225mg/serving | 60 servings
Vitanica is built around naturopathic women's health and has a track record specifically in this category; pick this if brand specialty matters to you
Check Price on Amazon →Also Scored
Vitex Berry Liquid Phyto-Caps, 60 Capsules
$0.50/day | Liquid phyto-cap with vitex berry extract (dried herb equivalent)
Chaste Berry Vitex Extract 300mg, 90 Veg Capsules
$0.18/day | Vitex agnus-castus fruit extract 300mg + 100mg dong quai root, vegetarian capsule
Vitex Chasteberry 400mg, 100 VegCaps
$0.16/day | Whole vitex agnus-castus fruit (no standardization figure), vegan capsule
Organic Vitex Chasteberry, 120 Capsules
$0.20/day | Organic vitex agnus-castus berry powder (whole fruit, no standardization)
What to Look For When Buying
- ✓Pick a standardized extract over whole-fruit powder - two products labeled 'vitex 400mg' can deliver very different active compound loads
- ✓Look for standardization to aucubin or agnusides (typically 0.5-0.6%), or for the Ze 440 or BNO 1095 trial extracts where available
- ✓Nature's Way Femaprin (40mg standardized + B6) is the closest US match to the Schellenberg trial dose and protocol
- ✓Generic standardized extracts at 175-225mg/day (e.g., Pure Encapsulations Chaste Tree 225mg) are also in the trial range
- ✓Plan a full 3-cycle trial before judging response - the published trials all measured at 3 months, not 1 week
- ✓Take once daily continuously, not just during PMS days - that is not how it was studied
- ✓Do not take while pregnant or breastfeeding (vitex lowers prolactin, which reduces milk supply); avoid with antipsychotics or pituitary disorders
Frequently Asked Questions
How long until vitex works for PMS?
The clinical trials measured outcomes at 3 menstrual cycles, not at 1 week or 1 month. Most women who respond notice clearer improvement by cycle 2 or 3. If you have not seen any change by the end of cycle 3, the published trial design says it is reasonable to stop. Taking vitex for a few days around your period and judging it on that is not how it was studied.
Can I take vitex while breastfeeding?
No. Vitex acts on dopamine D2 receptors at the pituitary to reduce prolactin, and prolactin is the hormone that drives milk production. Lowering prolactin can lower milk supply, which is exactly the opposite of what a nursing mother wants. Wait until you have weaned before considering vitex.
Does vitex affect birth control pills?
We don't know with certainty, and that is the honest answer. There is no large interaction study of vitex with combined oral contraceptives, the patch, the ring, the implant, or hormonal IUDs. Theoretically, vitex's mild hormonal activity could interact, and case reports of breakthrough bleeding exist but are not conclusive. The conservative move is to talk to your clinician before combining them, especially if you are relying on the pill for contraception rather than only for cycle management.
What is Ze 440 and why does it matter?
Ze 440 is a specific standardized vitex extract made by Zeller in Switzerland, dosed at 20mg/day. It is the extract used in the Schellenberg 2001 BMJ trial and several follow-up studies, so when researchers and clinicians say 'vitex works for PMS' they often specifically mean Ze 440. BNO 1095 (Femicur, made by Bionorica in Germany) is a similarly well-studied extract. US OTC products often use generic vitex fruit powder or non-branded extracts, which may or may not match the active compound profile of Ze 440. Pick a product that documents standardization (to aucubin, agnusides, or a 0.5%+ active level) rather than one that just lists 'vitex fruit 400mg.'
Does vitex help PMDD or just regular PMS?
The strongest evidence is for PMS, the broader cluster of cyclical symptoms. Premenstrual dysphoric disorder (PMDD) is a more severe, more strictly defined diagnosis with prominent mood symptoms, and the trial picture for PMDD specifically is mixed. Some smaller trials show benefit, others do not, and the populations and outcome measures vary. If you have a confirmed PMDD diagnosis, vitex is not a substitute for evaluation by a clinician who can discuss SSRIs and other better-evidenced options for PMDD.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products discussed on this page are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare professional before starting any supplement regimen.