No side effects. Drinking water is to better excrete toxins. The so-called normal drinking water is just to maintain a normal amount of water. Drinking too much water will increase the burden on the body, but it is not good. People can drink 2000 ml to 3000 ml of water a day. According to the standard of two milkshakes a day, drink 500ml each morning and evening. If you don't like drinking water, you only need to drink 1000ml of water during the day. In addition, don't drink water before going to bed at night 1 hour to avoid increasing the burden on the kidneys after going to bed.