Chasteberry tea (vitex): benefits and how to make it

Chasteberry tea is a herbal infusion made from the dried, ground fruit of Vitex agnus-castus, the chaste tree, once used by monks as a substitute for pepper. PMS here means the physical and emotional symptoms that show up in the one to two weeks before a period and ease once it starts, which is different from a PMDD diagnosis.

Almost everything we know about vitex and premenstrual symptoms comes from trials of a standardized extract in tablet or liquid form, not from loose tea. In those trials, the extract lowers prolactin by binding to dopamine receptors in the pituitary gland, which is why its clearest effect is on premenstrual breast tenderness, or mastalgia ( [1], [2], [7]).

People reach for the tea hoping for a similar PMS-easing effect, since it's the same plant. A cup of tea likely delivers a less concentrated, less consistent dose of the plant's compounds than a manufactured extract, though no study has measured this directly. For the basics on the herb itself, see vitex (chasteberry): what it is and whether it helps PMS. If you're asking because you suspect PMDD rather than typical PMS, the research there is thinner still: see vitex (chasteberry) for PMDD: does it work?.

A 2017 systematic review pooled 14 randomized trials of Vitex agnus-castus extract and found a large effect on PMS symptom scores compared with placebo. The authors flagged a high risk of bias and very high variability between studies, and said the pooled result should be read as exploratory, not definitive ( [3]).

A small 2026 trial tested seed-cycling capsules that included chasteberry in the second half of the cycle, alongside several other seeds, and found improvement in PMS symptoms over two cycles. It had no placebo group and tested a blend, so it can't tell you what chasteberry alone contributed ( [4]).

A 2024 survey found pharmacy students held a mostly positive opinion of chaste tree berry for PMS, but that reflects belief, not a trial result ( [5]). None of this research used tea as the delivery method.

Put together, standardized vitex extract may ease some PMS symptoms, especially breast tenderness, more reliably than it eases mood symptoms. Chasteberry tea borrows that reputation without evidence of its own. For a closer look at the supplement data, see vitex (chasteberry) for PMS: does it work?.

To make chasteberry tea at home:

• Use 1 to 2 teaspoons of dried, crushed chasteberries, or one vitex tea bag, per cup.
• Pour boiling water over the berries and cover the cup so the steam doesn't escape.
• Steep for 10 to 15 minutes, then strain if you used loose berries.
• Expect a bitter, peppery taste. A little honey or a slice of lemon softens it.

This is standard herbal-tea practice, not a method any of the trials above tested. The extract studies used a measured, standardized liquid or tablet extract, which concentrates the plant's compounds in a way a home infusion can't match.

There's no clinical trial that set a dose for the tea form, so there's no number here to point you to with confidence. The capsule and tablet trials behind the PMS and mastalgia findings used a standardized extract at a fixed strength chosen by the manufacturer, and that strength doesn't translate into a count of teaspoons of dried berries.

There's no trial-backed amount for the tea itself. If you try it, follow the package instructions and judge it over two to three cycles rather than days. Judge it over two to three cycles, not days, since that's the window used in the extract trials. How long does vitex take to work? walks through that timeline in more detail. For the amounts actually used in the studied extract products, vitex dosage: how much and when is the page to read.

Vitex is generally well tolerated. A review of the clinical literature lists the usual side effects as minor, including stomach upset, dizziness and a dry mouth ( [8]). The same review found no reported herb-drug interactions, but it recommends caution if you take a dopamine agonist or antagonist, since vitex's active compounds act on dopamine receptors ( [8]).

A single case report describes a woman who developed a drug-induced psychotic disorder after taking chasteberry for PMS ( [6]). It's one report, not a pattern, but it's a reason for care if you or a close family member has a history of psychosis, or if you take medication that affects dopamine, including some Parkinson's and antipsychotic drugs.

Vitex side effects, including mood covers this in more depth, with what the mood-related reports actually say.