Is shatavari a phytoestrogen?

It is often called one, but the evidence is thin. Laboratory work suggests saponin effects on hormone receptors, while the best human trial found no difference in oestradiol or FSH against placebo. Direct oestrogen-receptor activity in people has not been established.

Is shatavari only for women?

Traditional use centres on women, and the trials discussed here were in women. It is generally regarded as a gentle, nourishing tonic.

Can I take shatavari with ashwagandha?

The two are traditionally paired, and the 2025 trial gave them together for eight weeks with only mild side effects (loose stools and dizziness in a few people). That arm was exploratory, though, so it is early evidence. They appear together in Hormone Harmony.

Can I take it while breastfeeding?

Shatavari has a long traditional use in the postnatal period, but the evidence is limited and EarthWise formulas are not recommended while breastfeeding. Speak to a practitioner or lactation consultant.

Shatavari: What It Is, How It Works, and When to Use It

Sarah Burt

Oct 14

6 min read

Shatavari (Asparagus racemosus) is the root of a climbing plant related to garden asparagus, and a classic Ayurvedic tonic traditionally used to support women's health through the reproductive years and beyond. In a recent eight-week trial of 135 women aged 45 to 65, 300 mg a day of root extract was linked to lower menopause symptom scores than placebo. It appears in the EarthWise Hormone Harmony and MenoEase Day formulas.

Shatavari, a white star-shaped flowers on a green stem against a soft blurred green background.

What it is

Shatavari is a spiny, climbing member of the asparagus family, native to India, Sri Lanka and the Himalayan foothills. It is related to the vegetable but is not the one you eat. The part used in herbal medicine is the tuberous root, which grows in clusters beneath the plant.

The Sanskrit name is often translated as "she who has a hundred husbands", a classical nod to fertility and vitality. Some sources give "a hundred roots" instead, which fits the plant's many tubers. Either way, the name tells you where it has always sat in Ayurveda: as a rasayana, a nourishing tonic taken over months, and one of the main traditional herbs for women, including after childbirth.

A buyer's note worth reading. Shatavari is sold as powder, capsules and liquid extract, and quality varies. Most trials used standardised extracts, so a spoonful of root powder is not directly comparable to trial doses. Some imported Ayurvedic products have been found contaminated with heavy metals, so buy from a supplier that tests its raw materials.

The active compounds

The root is rich in steroidal saponins, known as the shatavarins, along with flavonoids and smaller amounts of other plant compounds. The saponins are thought to account for much of the activity, and standardised extracts are often measured by saponin content. Ayurveda traditionally describes the root as cooling and nourishing.

Does it act like a plant oestrogen? This is the question most people ask, and shatavari is often loosely called a phytoestrogen. The human evidence for that is thin. In the 2025 trial described below, oestradiol and FSH did not differ between the shatavari and placebo groups after eight weeks. So whatever lies behind the change in symptom scores, a simple shift in those hormones does not explain it. Laboratory and animal work suggests saponin effects on hormone receptors, but direct oestrogen-receptor activity in human tissue has not been established.

Other proposed activity. Shatavari shows antioxidant activity in laboratory studies, and traditional use places it among the adaptogen-style tonics. In the 2025 trial the arm combining shatavari with ashwagandha showed the largest fall in perceived stress, but that arm was exploratory and the trial was not designed to test it.

What the research shows

Shatavari has a very long traditional record and a young clinical one. The human trials are short, fairly small, and many have been supplied or sponsored by extract manufacturers. Here is how the evidence grades.

Evidence: menopausal symptoms. The best trial is a 2025 randomised, double-blind, placebo-controlled study (Ademola and colleagues, Frontiers in Reproductive Health) of 135 women aged 45 to 65, in three arms of 45: shatavari 300 mg a day, shatavari 300 mg plus ashwagandha 250 mg a day, or placebo, for eight weeks. The Menopause Rating Scale total fell by about 13 points in both active arms against about 3 points on placebo, and hot flush scores fell more with shatavari alone than with placebo. Liver, kidney and thyroid markers stayed stable, and side effects were mild.

Evidence: breastfeeding. Shatavari has a long traditional use after childbirth. Reviews of herbal galactagogues, including a 2020 Cochrane review of oral galactagogues, judge the evidence mixed in quality, and effects on infant outcomes are less well established than effects on milk volume. EarthWise formulas are not recommended while breastfeeding, and traditional use is a separate matter from product advice.

Evidence: muscle and strength. A small trial in postmenopausal women reported better handgrip strength with shatavari (O'Leary and colleagues, 2021, Nutrients). Most of this work comes from one research group, and independent replication is limited.

Not yet tested. Broader claims about hormone effects or cycle regularity have not been tested directly in human trials, and I would regard them as marketing until they have.

Sarah's clinical perspective

I include shatavari in Hormone Harmony and in MenoEase Day because I find it works best as part of a formula, for women whose stress, sleep and hormones are tangled together. It is a nourishing herb and a slow one, so I ask for at least eight weeks and I want the basics in place alongside it.

I am careful with it in anyone who has an oestrogen-sensitive condition, and I do not use it in pregnancy. If someone has new or unexplained symptoms, especially irregular bleeding, I send them to their GP first, because a herb is never the right first step there.

Practical guidance

Dose. Recent trials have used about 250 to 1,000 mg a day of standardised root extract for 8 to 12 weeks, and the best-known trial used 300 mg a day. Whole-root powder, decoctions and teas are less standardised and cannot be compared directly. These are the amounts researchers used, not a dosing instruction for any particular product.

Format. A well-made liquid extract (tincture) is easy to dose. Standardised capsule extracts match the trial evidence most closely. Choose a supplier that tests for contaminants.

Time to effect. Allow about eight weeks. In the 2025 trial, the shatavari-only group had not yet separated clearly from placebo on the overall symptom score at week 4, and the difference was clear by week 8.

Timing. There is no firm consensus. It is traditionally taken daily over months.

What it does not replace. Shatavari does not replace a medical assessment of new symptoms. It supports a routine of sleep, nourishing food and stress management, and it works alongside those.

For how to take the EarthWise tonics specifically, the dose and full safety information are on each product page.

Common questions

Is shatavari a phytoestrogen? It is often called one, but the evidence is thin. Laboratory work suggests saponin effects on hormone receptors, while the best human trial found no difference in oestradiol or FSH against placebo. Direct oestrogen-receptor activity in people has not been established.
Is shatavari only for women? Traditional use centres on women, and the trials discussed here were in women. It is generally regarded as a gentle, nourishing tonic.
Can I take shatavari with ashwagandha? The two are traditionally paired, and the 2025 trial gave them together for eight weeks with only mild side effects (loose stools and dizziness in a few people). That arm was exploratory, though, so it is early evidence. They appear together in Hormone Harmony.
Can I take it while breastfeeding? Shatavari has a long traditional use in the postnatal period, but the evidence is limited and EarthWise formulas are not recommended while breastfeeding. Speak to a practitioner or lactation consultant.

Where shatavari appears in the EarthWise range

Shatavari is one of the four herbs in Hormone Harmony, Sarah's formula for the stress and hormone overlap, where it sits with Ashwagandha, Chaste Tree (Vitex) and Holy Basil.

It is also in MenoEase Day and Night: the Day formula pairs it with Red Clover, Sage, Turmeric and Rosemary, herbs traditionally used to support women through the menopause transition.

If you are not sure which formula fits, the EarthWise health quiz is the best place to start. Full safety information is on each product page.

When to seek professional support

Shatavari appears well tolerated in short trials, but long-term safety data are limited. Check with a practitioner first in these situations:

Pregnancy and breastfeeding. It is not recommended, as controlled safety data are sparse.
Oestrogen-sensitive or hormone-sensitive conditions. Some laboratory work raises a theoretical concern, so speak to your GP, practitioner or oncology team first.
HRT, hormonal contraception or other hormone-related medicines. Shatavari may influence hormonal activity, so seek practitioner advice before combining them.
Diuretics or kidney problems. Shatavari has been described as mildly diuretic, and data in kidney impairment are limited.
Allergy to asparagus-family plants. Rare allergic reactions have been reported.
New or unexplained symptoms. Irregular or heavy bleeding, new pain or persistent changes should be assessed by your GP before you try any herb.

Sarah Burt is a registered naturopath, medical herbalist and iridologist with 25+ years of clinical experience. All EarthWise tonics are formulated by Sarah based on her clinical protocols.

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This article is for informational purposes only and is not intended to diagnose, treat or cure any health condition. Always consult a qualified health practitioner before making changes to your health regimen.