The ph of soda water is too high. Drinking soda water for a long time may cause alkalosis, manifested as anorexia, nausea, headache, convulsions and even coma, especially for the elderly and patients with kidney disease. So he can't use it instead of drinking water! The ph value of normal human body is between 7.35 and 7.45. Too low ph will lead to acidosis, and too high pH will lead to alkalosis! But I can recommend you a healthy drinking water, which is purified by water machine-high-energy activated water! Can be drunk for a long time, which is very good for your health! What I know better is that the water purified by Deli high-energy direct drinking machine fully meets the seven standards of healthy drinking water published by the World Health Organization. The ph value is between 7.35 and 7.45!