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HFL Health Findings Lab

Vitex

A clinically validated botanical for managing premenstrual syndrome (PMS) and supporting healthy progesterone-to-estrogen ratios.

Evidence-Based
Fact-Checked
Updated: Sep 07, 2026
Clinical Profile

Quick Reference

Scientific Rating
4.7
/ 5.0
Primary Mechanism
Dopaminergic action inhibiting prolactin secretion to support luteal phase progesterone synthesis
Standardized Form
Fruit extract (standardized to agnusides or casticin)

Vitex agnus-castus, commonly known as chasteberry, is highly effective for female hormonal balance. It operates primarily at the level of the pituitary gland. By binding to dopamine D2 receptors, it inhibits the excess secretion of prolactin. This mild reduction in prolactin helps normalize the luteal phase of the menstrual cycle, naturally supporting the body's own production of progesterone.

Clinical Summary

Strong clinical consensus supports its use for relieving physical and psychological symptoms of PMS, particularly breast tenderness, mood swings, and fluid retention.

Dosage Guidelines

20mg to 40mg daily of standardized extract, ideally taken in the morning.

Safety & Side Effects

Exceptionally safe. Occasional mild nausea, headache, or temporary menstrual changes during the first month of use.

Known Interactions

Avoid concurrent use with dopamine agonists (e.g., Parkinson's medications) or oral contraceptives.

Scientific References

Medical Disclaimer

The information provided in this clinical review is for educational and informational purposes only. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment.

*These statements have not been evaluated by the Food and Drug Administration (FDA). This product or ingredient is not intended to diagnose, treat, cure, or prevent any disease.

Always consult your physician or other qualified health provider with any questions you may have regarding a medical condition, or before beginning any new diet, fitness, supplement, or treatment regimen, especially if you have pre-existing medical conditions or are taking prescribed medications.

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