There will be no side effects. After the magnetized water in the broken cup enters the human body, magnesium ions will be released continuously. Oxygen ions and trace elements are slightly alkaline, which helps to dissolve toxins in intestines or other parts of the human body, and ultimately produces antioxidant effects. After the broken cup is opened, soak it in cold water for 24 hours. Users need to rinse with warm water, so that the ore and the cup can be perfectly integrated. Don't put water and drinks above 60℃ in the cup. Because it may destroy the generation of magnesium ions.