A. Alkaline water found in nature have minerals that have a natural affinity to the body, hence no matter how high the PH level of alkaline water that is often found in thermal sprongs with pH of 10 and above, they always have a healing effect on the body. On the other hand, alkaine water produced by ionizing alkaline machines has no natural affinity with the body and if consumed in large amount has the potential to raise the pH level of the stomach above its natural level on 1.2 to 3.5 leading to undigested food and othe health problems. Read More.