Vitex (Chasteberry)
A traditional luteal-phase herb with a modern evidence base.
What it is
Vitex agnus-castus, or chasteberry, is the fruit of the chaste tree. It acts on dopamine receptors in the pituitary, which can influence prolactin levels and, indirectly, the balance of the luteal phase.
Why it’s used
- Traditionally used for short luteal phases and cycle irregularity.
- Commonly used for premenstrual symptoms such as breast tenderness and mood shifts.
- Typically taken in the first half of the cycle or continuously, not during pregnancy.
What research says
- Randomized placebo-controlled trials report significant reductions in premenstrual syndrome symptom scores with standardized vitex extract.
- Small studies suggest vitex may lower mildly elevated prolactin and lengthen a short luteal phase.
- Evidence for direct conception rate improvement remains limited; more high-quality trials are needed.
Typical dose: 20–40 mg standardized extract daily. Discontinue once pregnant.
Lunara products with Vitex (Chasteberry)
References
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Educational information only. These statements have not been evaluated by the FDA. This content is not medical advice and Lunara products are not intended to diagnose, treat, cure, or prevent any disease.