Chaste Tree

Chaste tree is native to the Mediterranean region and is most famous for its alleged anti-aphrodisiac effect in men. In ancient times it was given to monks to "cool the heat of lust" and aid their attempts to remain chaste.

 Botanical name: Vitex Agnus-castus

Common name: Chasteberry, Abraham’s balm, Monk’s pepper

Part used: Fruit

More recently, Chaste tree has been investigated for its potential insect repellent properties. In a study of 70 herbal extracts, it came out on top in its ability to ward off attacks by blood-sucking arthropods and it was shown to repel a variety of biting insects, including mosquitoes, for up to 6 hours.  

Frequently asked questions

What is chaste tree good for?


Chaste tree (Vitex agnus-castus), also known as vitex, is a Mediterranean herb traditionally used to support women’s hormonal health. It’s best known for easing the symptoms of premenstrual syndrome (PMS), such as breast tenderness, mood changes, irritability and bloating, and for supporting a regular menstrual cycle. The part used is the small, peppery berry of the chaste tree, which has been used for women’s health since ancient Greek times.

Does chaste tree help with PMS?


Yes, chaste tree is one of the best researched herbs for PMS. Several clinical studies have found that it may help reduce common PMS symptoms, including breast tenderness, irritability, mood swings, headaches and bloating. Chaste tree is thought to work by acting on the pituitary gland in the brain, helping to support a healthy balance of hormones, including lowering raised levels of prolactin. It’s usually taken once daily, in the morning.

Why is it called chaste tree?


The name comes from its long reputation for dampening desire. In ancient Greece, women observing ceremonies of chastity were said to use the plant, and in the Middle Ages monks used the dried berries to help them keep their vows of celibacy. The berries also have a peppery taste, which earned the herb another common name, monk’s pepper. Today, chaste tree is valued not for this traditional use but for its support of women’s hormonal balance.

How long does chaste tree take to work?


Chaste tree is a slow-acting herb, so its benefits build gradually with consistent daily use. Most women begin to notice a difference after two to three menstrual cycles, and clinical studies typically assess results after three months. For best results, take it every day throughout your cycle rather than only when symptoms appear. Always follow the dosage directions on the product label.

Are there any side effects of chaste tree?


Chaste tree is generally well tolerated when taken as directed, though some people may experience mild stomach upset, headaches, skin rashes or changes to their cycle. Avoid chaste tree during pregnancy and breastfeeding, and if you’re trying to conceive through IVF or other fertility treatments, unless advised by your healthcare professional. Check with your healthcare professional before use if you take the contraceptive pill, hormone replacement therapy, medication for Parkinson’s disease, antipsychotics or other prescription medicines, or if you have a hormone-sensitive condition. Chaste tree is not suitable for children.