Magnet therapy is an alternative medicine practice that uses weak static magnetic fields from permanent magnets placed on the body, often in bracelets, jewelry, insoles, or blankets. Practitioners claim health benefits such as improved blood flow, pain relief, and even cancer treatment, but no credible scientific evidence supports these effects. The fields produced are far too weak to influence blood, tissue, or organs, and proposed mechanisms like restoring an “electromagnetic energy balance” lack medical basis. Clinical trials suffer from blinding problems and generally show no meaningful benefit. Despite this, magnet therapy remains a billion‑dollar global industry with heavily regulated health claims.