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Homeopathic remedies outperform placebo

The weight of high-quality evidence indicates that homeopathic remedies do not reliably outperform placebo. Systematic reviews of systematic reviews and Cochrane reviews consistently find no convincing evidence of efficacy beyond placebo across a range of conditions, though some meta-analyses of low-quality trials report small effects that do not survive bias adjustment.

Largest vulnerability: Significant uncertainty — conflicting evidence is the main limit: Support ratio 37% (direction: mixed) — evidence is genuinely split.

The competing claim

A meta-analysis of randomised, double-blind, placebo-controlled trials of non-individualised homeopathy found a statistically significant effect size favouring homeopathy over placebo.

This meta-analysis reports a statistically significant pooled effect favouring homeopathy over placebo, which superficially opposes the consensus. However, it diverges from the consensus primarily because of methodological limitations the authors themselves acknowledge: the included trials are highly heterogeneous in design, condition, and remedy, and the pooled effect is driven substantially by lower-quality trials. This is a classic case of cherry-picking through selective pooling — aggregating studies of widely varying quality allows small, biased trial results to generate an apparently positive signal. The consensus position, informed by bias-adjusted analyses and overviews of systematic reviews, holds that such effects disappear when study quality is properly accounted for, meaning the counter-claim suffers from a failure to adequately correct for publication bias and methodological confounding.

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Sources (25)

Analyzed by Epistry · last updated July 1, 2026 · homeopathy, placebo, clinical efficacy, alternative medicine
Homeopathic remedies outperform placebo — Epistry