Well, cancer patients are typically acidic, which means that the environment in which cancer cells live is acidic, and the acidic environment is a hotbed for cancer cells to survive. Your idea is right, but soda water is an inorganic base, which is not good for your health. So if you choose alkaline food, you can eat more fruits and vegetables, which is better than soda water, and you can eat tea magu. Chamagu is a typical alkaline plant. I hope the patient will recover soon ~!