Is drinking water boiled by electric kettle harmful to people's health for a long time?

Drinking water boiled by electric kettle for a long time will not cause harm to human body. However, the steel inside the electric kettle must be more than 304 food-grade steel. Also, after the water in the kettle is boiled once, it should be finished in a few hours. Don't stay overnight, and don't cook repeatedly. That kind of water is not good for your health. After all, the drinking water in the city has been treated now. Drink it directly after boiling, and don't burn it again, so that the electrolyte inside and the components in the water will be destroyed, which is not very good for the body.