Mucuna Pruriens

Mucuna pruriens · Velvet bean · Kapikachhu

Snapshot

Indications	Contraindications
Parkinson's disease¹ Male infertility² Sleep quality³ Smoking cessation⁴	Pregnancy or nursing⁵ Under age 18⁵

Mucuna pruriens (velvet bean, kapikachhu) is a tropical legume whose seeds contain levodopa, the dopamine precursor that drives most supplementation. It is used as a levodopa source in Parkinson's disease, chiefly where marketed levodopa is unaffordable, and in Ayurveda for male infertility and as an aphrodisiac. A multi-herb formula containing it has been tested for smoking cessation⁴.

In Parkinson's disease, randomized crossover trials found single doses of mucuna seed powder comparable to standard levodopa on motor response, with a longer symptom-controlled period^{1, 6, 7}. Daily use is less settled: a 12-month open-label trial found similar outcomes to levodopa with more frequent adverse events, and a 16-week crossover pilot saw many patients stop early for gastrointestinal effects. In a 2026 laboratory analysis of commercial preparations, measured levodopa content fell below manufacturer-reported values; no trial has tested whether this changes clinical response. More than one thousand products list Mucuna pruriens, mostly as capsules and powders; see Form comparison.

Because the effect is levodopa's, a case report described dopamine dysregulation syndrome after mucuna was added to carbidopa-levodopa⁸. Health Canada labels ask for practitioner advice before use alongside other medications⁹ and in Parkinson's disease or psychosis⁹.

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

In the full monograph

34 sources, 21 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