What can you say about chasteberry (vitex) in your ads and on your site?

The library supports 2 wordings for chasteberry (vitex); the strongest is “Helps relieve premenstrual symptoms” (moderate, 30-2,000 mg dried fruit (or extract equivalent) a day). Avoid wording that names or implies a disease, a drug or a treatment, such as “Treats infertility, PCOS or endometriosis”.

Also called: Chaste tree, Vitex, Vitex agnus-castus

Reviewed 14 October 2026

Not legal advice. This guide shows the wording that published evidence supports at a daily dose, from the sources linked below; it is not a ruling on any claim. Your own product, its form and dose, and your own evidence still need to match the wording you use.

Supported wordings

What you can say.

Moderate evidenceWording 1

Claims Facts

“Helps relieve premenstrual symptoms.”

Daily dose	30-2,000 mg dried fruit (or extract equivalent) a day
Support	Health Canada lists it as a herbal medicine use; no other listed source covers it.
Dose details	Adult women 18 and older; use for at least 3 months to see an effect.
Form	Dried fruit, powder or extracts
Source	Health Canada monograph: Chaste tree

Moderate evidenceWording 2

Claims Facts

“Helps relieve menopausal symptoms such as hot flushes.”

Daily dose	30-2,000 mg dried fruit (or extract equivalent) a day
Support	Health Canada lists it as a herbal medicine use; no other listed source covers it.
Dose details	Adult women 18 and older; use for at least 3 months.
Form	Dried fruit, powder or extracts
Source	Health Canada monograph: Chaste tree

How strong the evidence is

Strong evidence: At least two listed sources support it independently at a comparable dose and form, and none disagrees.
Moderate evidence: One listed source supports it as an evidence-based use at that dose, and no listed source disagrees.
Limited evidence: The only support is traditional use, the sources disagree, or the source itself calls the evidence weak.

Wordings to avoid

What to leave out.

Claims Facts

Ingredient: Chasteberry (vitex)

Wording to avoid	Reason
“Treats infertility, PCOS or endometriosis”Names diseases.	Disease
“Treats premenstrual dysphoric disorder (PMDD)”Names a disorder; the supported wording is premenstrual symptoms.	Disease

Disease: names or implies a disease. Drug: names a drug or presents the product as one. Treatment: promises to treat, cure or prevent a condition.

Sources

Where this comes from.

All ingredient guides

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