Kudzu

Pueraria lobata · Pueraria montana · Kudzu root

Snapshot

Indications	Contraindications
Alcohol intake reduction^{1, 2} Menopausal symptoms^{3, 4} Glycemic control in diabetes⁵ Bone resorption markers⁴	Hormone-sensitive cancer⁶ Tamoxifen use⁶ Pregnancy or breastfeeding⁷ Hypersensitivity to kudzu⁶

Kudzu is the root of Pueraria lobata (also classed as Pueraria montana), a Chinese medicine herb whose isoflavones, chiefly puerarin, are thought to drive its effects^{6, 8}. Its estrogen-like activity⁶ underlies its use for menopausal symptoms. People also take it to reduce alcohol intake in heavy drinkers^{1, 9} and, in Chinese multi-herb formulas, for glycemic control in type 2 diabetes. Typical users are heavy or binge drinkers and perimenopausal or postmenopausal women.

The alcohol data are the most consistent in non-treatment-seeking drinkers, but a recent placebo-controlled trial in treatment-seeking adults receiving counseling found kudzu no better than placebo¹⁰. An open-label dose-ranging study in postmenopausal women reported lower menopausal symptom scores, while a systematic review found the evidence of benefit for any condition limited and unclear⁶. A 2023 systematic review of preclinical studies found puerarin neuroprotective in animal models of neurological disorders and called for randomized trials in patients¹¹. Kudzu products come as capsules, tablets, powders, and liquids; see Form comparison.

The consequential caution follows from the estrogenic activity: hormone-sensitive cancers and tamoxifen use are the stated reasons the guide gives for not taking kudzu⁶. Health Canada labels ask people taking prescription medications to consult a health care practitioner before use⁷.

Last updated October 16, 2026. Read how we make monographs.

In the full monograph

45 sources, 41 studies

When to useThe situations practitioners use it for, each with the reason and the study behind it.
SafetyWho should avoid it, who needs extra care, and the side effects reported in studies.
InteractionsThe medicines and supplements it interacts with, the effect of each, and what labeling says to watch.
Protocol notesThe doses used in studies, how and when they were taken, and how the forms on the market compare.
How it worksWhat it is and how it works in the body, in plain terms.
Published studiesThe studies behind each use, popular claims checked against them, and trials still under way.
Word of mouthWhat patients and practitioners report online, kept separate from the clinical evidence.
Clinical perspectiveA closing read of where the evidence is solid, where it is thin, and what has not been studied.

Snapshot

In the full monograph

Sources