Ginger

Overview

Ginger is the rhizome (underground stem) of Zingiber officinale, a plant used both as a kitchen spice and as a remedy across several traditional medical systems. Its best-studied active compounds are gingerols, shogaols, zingerone and paradols, which laboratory research links to antioxidant and anti-inflammatory activity through pathways like Nrf2 activation and NF-κB modulation^1,2.

The strongest human evidence in this profile concerns menstrual cramps. A 2024 meta-analysis pooling multiple trials found ginger measurably reduced pain intensity in primary dysmenorrhea (period pain not caused by an underlying condition)³. An earlier meta-analysis of nine trials with 647 women found ginger outperformed placebo for period pain, with an even larger effect size than cinnamon or fennel in the same analysis⁴. Ginger also has a long documented history as a warming remedy for joint pain and stiffness across Traditional Chinese Medicine, Kampo, Korean medicine, Ayurveda, Unani, and Western herbalism, detailed below.

Dosage

The two meta-analyses on primary dysmenorrhea confirm ginger reduced pain intensity compared with placebo^3,4, but the abstracts provided in this brief report the pooled effect sizes (standardized mean differences and weighted mean differences) rather than a single agreed dose across the included trials. No consistent milligram-per-day figure from these clinical studies could be extracted from the material reviewed. Separately, a Western herbalism source describes a traditional oral dose of a quarter to one gram of powdered ginger rhizome three times daily, as documented in the British Herbal Compendium and later carried into an EU traditional-use monograph — this is traditional-use documentation, not a clinical trial dose⁵.

Interactions

No drug or herb interaction data was found in the reviewed studies. Neither meta-analysis on dysmenorrhea nor the reviews on ginger's antioxidant/anti-inflammatory activity reported interactions with medications or other herbs.

Traditional Use

Evidence Strength

The evidence for ginger's most concrete human benefit — easing primary menstrual cramps — rests on two meta-analyses pooling a modest number of trials (nine studies covering 647 women in one of them), which is a reasonably solid signal but still built from a limited pool of underlying research. The antioxidant and anti-inflammatory mechanisms discussed in this profile come from lab and cell-based reviews, not from human trials, so they explain a plausible "why" without themselves proving an effect in people. Ginger's traditional use for joint pain across multiple systems of medicine is extensively documented historically, but none of it has been tested in a modern human study within this brief, so those uses remain unstudied by that standard.