Based on the mechanism of a reverse osmosis system, Foot Detox Ion Spa works by charging water in foot tub with positive ions to draw out negative ions, where most toxins accumulate. The positive ones will then bind with the negative ions and remove them along with toxins & fluids for good. As a result, you will notice the changing color of water as these are different types of impurities released from your body. FEATURES Heal various health problems e.g. swelling, pain, inflammation, insomnia Remove negative ions Get rid of toxins, fluids, chemicals, radiation, pollution etc. Encourage better flow of blood circulation Prevents blockage of lymphatic system Improves metabolism & favors weight loss Purifies your body effortlessly Completely safe to use