The ancients called it Monk’s pepper. This is because chaste tree berry (also known as Vitex and by he trade name Femaprin) supposedly had the ability to decrease sexual desire. However, others say it is an aphrodisiac, in other words, it has the opposite effect. Can both be true?

Though a shrub, chaste tree will grow up to twenty-two feet tall. It is native to southern Europe and the Mediterranean region. It flourishes on moist riverbanks, but it can also be grown as an ornamental plant in American gardens. The beautiful blue-violet flowers blossom in midsummer. It is only used today for female problems.

That it could bring about opposite responses is not limited to sex drives. Chaste berry has been used to inhibit excessive milk in nursing mothers and to encourage lactation. It magnifies post menopausal problems and solves them. It both hinders conception and helps overcome infertility.

The reason for contradictory results from chaste tree berries is that it is an adaptogen. This means it works through the adrenal glands, in this case the pituitary, to produce adjustments in the body that normalize hormone imbalance. In other words, it constrains hormonal excesses and encourages deficiencies. Other herbal examples of adaptogens are garlic, ginseng, echinacea, ginkgo, goldenseal, and taheebo.

Because of its ability to balance the body, chaste tree berry reduces the production of certain hormones and increases the production of others. The reason it is used to treat infertility is that it tends to shift the balance in favor of the gestagens which hormones condition the body for pregnancy.

Chaste tree berry encourages production of progesterone. This is why the herb is especially effective in balancing the female reproductive system. It is taken to help restore menstruation, to regulate heavy periods, and, as mentioned above, to restore fertility caused by hormonal imbalance. Some using it have found relief from PMS tension, and eased the changes during menopause. Premenstrual breast tenderness, linked to excess prolactin, is helped with chaste tree berry.

Chaste tree berry is also used, in tincture form, to relieve pains in the limbs, to relief pain of paralysis, and to treat neuropathic muscular weakness. Some even use them to treat acne. The berries can be ground and used as a substitute for black pepper, the flowers and leaves, with their spicy aroma, used in flavoring.

As a tincture, use 20 drops one or two times a day. Or take 20 to 40 mg of the herb daily. Capsules or one cup of tea may be substituted as well. Some rest better when they take chaste berry shortly before bedtime. The herb is slow acting; wait at least two months or longer to know if it is helping.

Though not universally held, some say pregnant women and nursing mothers should not take chaste tree berry. A woman suffering from a hormone-sensitive cancer (e.g. uterus, breast, pituitary, etc.) should not take it. Nor should a woman taking hormone drugs such as oral contraceptives or menopausal hormone replacement therapies. Some react to it with an itchy allergic rash, some with mild nausea, and some with headaches. A few women have said that their cycle length changes.