The ClaimDetox foot baths like Ionic Detoxification, Aqua Chi, and Bionic Hydrotherapy claim to use electromagnetic forces conducted in waves--sometimes ionic waves--through water. Supposedly, through the foot, they enhance the body's energy force or chi--and the body then releases toxin via reflexology channels. The exiting toxins purportedly show as the water turns dark brown.
The RealityAn investigative report by British newspaper The Guardian Unlimited unveiled the secrets behind the brown water. The water corrodes the electrodes of the "ionic" device, which rusts. As the rust releases into the water, it turns brown. Salt from the feet, or any salts in the water, can accelerate this process and turn the water even browner.
According to popular health guru Dr. Andrew Weil, a foot bath cannot detoxify the body or re-balance cellular energy.