Vitex Guide

The Essential Guide to Vitex and the Chaste Tree

Dr. Jolene BrightenPublished: Last Reviewed: Sex Hormones Leave a Comment

Odds are that if you’re struggling with symptoms of hormone imbalance, PMS, PCOS, infertility, endometriosis, irregular periods, missing periods or any other period problem, you’ve heard of vitex. Today, I’ll be talking more about the benefits and potential uses of vitex (also called chasteberry and chaste tree berry). Consider this your guide to understanding if this herb is right for you.

What is Vitex?

According to Merriam-Webster, Vitex is:

“A large genus of chiefly tropical shrubs and trees (family Verbenaceae) having divided leaves and forking cymes of small flowers with a short tube and bilabiate limb.”

Vitex is an herb in the verbena family that has long been used in women’s medicine to balance hormones, enhance fertility and for overall hormone balance. I’m talking thousands of years, but it has only recently been validated by science. Vitex goes by many names: chasteberry, chaste tree, Abraham’s balm, and monk's pepper.

The plant is found in Greece, Italy, and parts of the Middle East. We only use the fruit, which is why you’ll commonly hear it referred to as ‘chaste tree berry’.

Vitex agnus-castus is an herb taken orally for premenstrual tension syndrome (PMS), premenstrual dysphoric disorder (PMDD), irregular periods, painful periods, breast tenderness and symptoms of menopause. It is also a “go-to” herb for women struggling with breast tenderness, fibrocystic breasts (“lumpy” breasts), and for enhancing fertility.

How does vitex work?

To be clear: Vitex does not contain any hormones. Rather, it stimulates certain systems in the body and can therefore help with naturally balancing hormones.

For example, vitex has been shown to improve the reproductive systems of aging mice, leading researchers to conclude that it could be used to help women with sex hormone dysfunction and imbalance.

Additionally, it appears that vitex exhibits an effect on the pituitary to produce luteinizing hormone (LH), which is the hormone that triggers ovulation and the development of the corpus luteum. This, coupled with the fact that vitex can also increase progesterone and balance testosterone, makes vitex an ideal herb to help women with PCOS.

Vitex also binds to dopamine receptors, which lowers prolactin. When prolactin is too high (in a woman who is not pregnant or has not just given birth), it can cause the ovaries to stop producing estrogen, which can lead to irregular periods, vaginal dryness, and low libido. Lowering prolactin can alleviate symptoms of PMS.

What Are The Benefits of Vitex?

Vitex has myriad uses in women’s health. It helps with mood swings, anger, irritability, headaches, breast tenderness, and bloating leading up to your period or that are related to hormones.

Vitex has also been shown to effectively lower prolactin, which can be elevated in several conditions, including hypothyroidism and prolactinoma. Elevated prolactin can result in amenorrhea (a missing period).

Chasteberry May Improve:

  • Symptoms of estrogen dominance
  • Frequent periods, luteal phase defect
  • Mood swings, anxiety, depression, irritability
  • Hot flashes, night sweats
  • Headaches, migraines
  • Breast tenderness, fibrocystic breasts
  • Painful periods, menstrual cramps
  • PMS
  • PMDD
  • Fertility
  • Vaginal dryness
  • Sleep disturbance

Hormonal Imbalance

Chasteberry is an incredible herb to help balance hormones and optimize estrogen and progesterone levels. In cases of relative estrogen dominance, when there is insufficient progesterone relative to the amount of estrogen present, Chasteberry can help raise progesterone. Progesterone naturally opposes estrogen to minimize the negative effects it can have in your body.  

For women experiencing irregular or frequent periods, Vitex can help create predictable periods by improving progesterone levels.

Vitex can modulate prolactin, a hormone that is responsible for the production of breast milk. Elevated prolactin can cause amenorrhea, PMS, and more.

Premenstrual Syndrome (PMS)

A study of 1,634 women with various PMS symptoms showed that, over a three-cycle time period, symptoms (such as depression and cravings) were reduced or disappeared completely in 93% of subjects. That’s pretty incredible!

Clinically, I’ve seen women be able to resolve their breast tenderness, sleeplessness, and emotional concerns while using Vitex. It’s important to note that it will take the average woman about 3 months to notice its effect. That’s why I start women on Vitex immediately as part of my Balance—Women’s Hormones Support supplement in addition to diet and lifestyle therapies to bring their hormones into balance. Vitex is a great in supporting your body in balancing hormones naturally.

In a randomized, double blind, placebo controlled study that followed women over 3 menstrual cycles it was found that Vitex was beneficial in alleviating bloating, headaches, breast tenderness, PMS food cravings, agitation, depression, and swollen breasts.

Vitex Can Help With:

  • Mood swings, anxiety, depression, irritability
  • Headaches, migraines
  • Breast tenderness, swelling, fibrocystic breasts
  • Painful periods, menstrual cramps
  • PMS food cravings
  • Sleep
  • PCOS

Premenstrual Dysphoric Disorder (PMDD)

There have been studies showing that Vitex is effective at reducing the physical symptoms of premenstrual dysphoric disorder (PMDD).

Others studies have demonstrated Vitex as an effective treatment for PMS and PMDD with no adverse side effects.

Infertility in women

Vitex has been used for thousands of years as a natural fertility treatment in Greece, Italy, and many other regions of the world. It is thought to improve fertility because of its effect on prolactin levels.

Some women who struggle to get pregnant have what is called a luteal phase defect, a condition in which the second half of the menstrual cycle is too short. This can be related to abnormally high levels of prolactin and low levels of progesterone. Since vitex is effective at reducing prolactin in the body, and balancing estrogen and progesterone, it can support a regular cycle.

Vitex has been shown to be effective in supporting optimal progesterone levels. Low progesterone has been associated with infertility and increased risk of miscarriage.

Vitex is considered safe to take when trying to conceive. While there is no evidence that it can cause harm during pregnancy, I recommend my patients taper off the herb once they have a positive pregnancy test. Currently, there is not enough data available to state that it is completely safe in pregnancy. For that reason, I use caution in my practice.

If you do become pregnant while using this herb, please meet with a qualified health care provider who is trained in herbal medicine to help you taper off and decide if bioidentical progesterone therapy is necessary. A naturopathic physician is most qualified in this area.

Benefits of Vitex for PCOS

We used to think that Vitex only worked by raising luteinizing hormone (LH). For this reason, it was formerly thought that Vitex couldn't be use for women with PCOS, who find their internal LH levels are often too high and lead to symptoms.

But new research is showing that Vitex works via the dopaminergic system and exhibits a similar effect as dopamine on prolactin. Other studies have shown it has no effect on LH.

Clinically, I've found great success using Vitex with women who have PCOS. As such, it is an herb I use regularly with this condition.

Fibrocystic Breast Disease

Because women with fibrocystic breast disease and breast tenderness also typically struggle with PMS, herbal treatments for these conditions are often similar. Vitex is thought to help reduce breast pain because of its effectiveness in reducing prolactin levels and increasing progesterone.

Menopausal Symptoms

A study of 23 menopausal women indicated that vitex can be helpful in diminishing symptoms of menopause, such as night sweats, anxiety, and hot flashes. It has also been shown to be beneficial for women struggling with vaginal dryness and sleep disturbance.

It’s important to note that most studies combine Vitex along with other herbs like Black Cohosh and St. John's Wort, so the effects of Vitex alone for menopause have not been well evaluated. It is common to combine herbs in naturopathic medical practice or when meeting with an herbalist.

You’ll find a combination of Vitex, Black Cohosh, and other nutrients to support optimal hormones in Balance—Women’s Hormone Support.

When it comes to hot flashes, studies have shown that Vitex is more effective than a placebo at reducing symptoms in about 4 weeks.


Many women experience hormonal headaches and migraines. They’re an especially common around ovulation, as part of PMS, or when you begin your period. In fact, women who experience frequent migraines usually suffer their worst during PMS. Vitex may help reduce the severity and frequency of migraines.

As I explain in Beyond the Pill, women who experience migraines with an aura shouldn’t use hormonal birth control, like the pill, due to the increased risk of stroke. In addition, these synthetic hormones can make headaches and migraines worse in some women.

Breast Milk Production

At lower doses, chaste tree berry may support healthy breast milk production. Research has found that women taking Vitex experience an increase in breast milk production, but more evidence is needed to understand the use of the herb.

Because chaste tree at higher doses can be used to lower prolactin, the hormone responsible for lactation, it is recommended that women currently breastfeeding avoid high dose supplements. In my practice, I advise my patients to avoid dosing above 200 mg.

Vitex Side Effects and Precautions

Vitex is generally considered safe with very few women experiencing side effects when taking reasonable doses. It is important to note that while Vitex is a wonderful herb, more of a good thing isn’t necessarily better. In fact, I’ve found the majority of my patients who have ever reported issues have been taking doses that far exceeded the recommended dose.

Be cautious when selecting supplements because some forms are extremely high dose or are poorly sourced. Herbs are effective when grown in the correct conditions, harvested at the right time, and processed in a way that maintains their active ingredients.

Some reports have shown that supplements sold at grocery and department stores did not contain any of the herbs listed. In fact, some supplements that listed herbs didn’t actually have any of that herb and instead contained house plant material!

If you’re taking a supplement and feel it is ineffective or you’re not feeling well on it then you’d be wise to check the source. Unfortunately, where people buy the majority of their supplements (grocery, department, warehouse/ bulk buy stores) leave them susceptible to taking inferior products.

Look for supplements with GMP (Good Manufacturing Practice) on the label and non-GMO ingredients.

Vitex Side Effects and Precautions

Vitex is typically well-tolerated and most studies show no side effects with appropriate doses.

Uncommon side effects include headache, upset stomach, rashes, acne, weight gain, difficulty sleeping.

If you’re pregnant or breastfeeding, please check with your doctor before starting any new supplements. If you currently have or have a history of hormone sensitive cancers such as breast or ovarian cancer then it is important to consult your doctor first. Women with a family history of Parkinson’s disease or a personal history of mental illness should discuss Vitex with their doctor.


Vitex may interfere with certain antipsychotic drugs. In general, if you are taking a medication then it is not advised that you begin any supplement without first consulting your doctor.

Little is known about the effect of Vitex in women taking hormonal birth control. It is true that Vitex modulates your natural hormones and as such, it may theoretically interfere with synthetic hormones found in birth control.


Most women benefit from a daily dose of 100-200 mg by mouth.

My supplement Balance—Women’s Hormone Support by Dr. Brighten contains a 200 mg per serving. Typical dose is 2 caps twice daily with meals.

The Different Forms of Vitex

Vitex is an herb taken by mouth. Dried chasteberry is used to create tincture (liquid extract), solid extracts, and caps.

You can also use Vitex dried herb in teas. Some companies will make an herbal blend that contains Vitex, but it may not be in a high enough dose to get the desired effects. Vitex can be purchased dried if you’d prefer to make your own tea at home.

Our products that contain vitex

Balance—Women’s Hormone Support is comprehensive women's formula designed to harmonize sex hormones and improve common hormone related issues. Formulated with B Vitamins, antioxidants and hormone supporting herbs, this product helps support the body in eliminating excess estrogens and environmental toxins.  

Balance contains 200 mg of Vitex per serving, along with Black Cohosh, Resveratrol, Green Tea Extract (no caffiene), and other hormone supporting nutrients.

How does vitex affect fertility in women?

Vitex has traditionally been used to support fertility and is a favorite herb among women trying to conceive.

It is beneficial in reducing prolactin levels. When prolactin is elevated, things can get dicey: missing periods, irregular periods…basically, the opposite of what you need if you’re trying for a baby. When you’re trying to get pregnant, prolactin will work against you. We want prolactin to be normal, not high prior to conception. Prolactin should be elevated in women who are breastfeeding.

Vitex also aids in normalizing the length of your menstrual cycle and creating a healthy luteal phase. The luteal phase is approximately the two weeks following ovulation when progesterone should be at its highest. If the luteal phase is too short, progesterone levels may be too low. Progesterone is important for preparing the uterine lining for possible fertilization.  

I talk more about natural ways to increase progesterone levels and improve fertility in this article.


Vitex (also called chaste tree berry and monk’s pepper) is an herb used for thousands of years in Greece and Italy to promote fertility and balance hormones. It has been shownn to be effective in reducing PMS, PMDD symptoms, regulating periods, and normalize cycle length, as well as improving fertility. Vitex can be used to balance hormones such as estrogen, progesterone and prolactin.


Share this article:

Get Your FREE Hormone Starter Kit with

7 Day Meal Plan & Recipe Guide

This starter pack is exactly what every woman needs to bring her hormones back into balance!

Hormone Starter


About The Author

Dr. Jolene Brighten

Instagram Facebook

Dr. Jolene Brighten, NMD, is a women’s hormone expert and prominent leader in women’s medicine. As a licensed naturopathic physician who is board certified in naturopathic endocrinology, she takes an integrative approach in her clinical practice. A fierce patient advocate and completely dedicated to uncovering the root cause of hormonal imbalances, Dr. Brighten empowers women worldwide to take control of their health and their hormones. She is the best selling author of Beyond the Pill and Healing Your Body Naturally After Childbirth. Dr. Brighten is an international speaker, clinical educator, medical advisor within the tech community, and considered a leading authority on women’s health. She is a member of the MindBodyGreen Collective and a faculty member for the American Academy of Anti Aging Medicine. Her work has been featured in the New York Post, Forbes, Cosmopolitan, Huffington Post, Bustle, The Guardian, Sports Illustrated, Elle, and ABC News. Read more about me here.