Oncologists don't study nutrition or holistic medicine. Despite their brilliance, they have no clue to holistic aids/cures that aren't published by big pharma paid studies. An example is Vitamin C, because they can't patent it and charge an arm and a leg for it, they won't publish studies showing its effectiveness in therapeutic doses. Alkaline water is simply water with a high 8-9 pH. When it reaches the stomach, like most content, the stomach pumps out acid to bring it down to the 2-4 pH. Where the benefit is, is that the body sends out alkalizing buffers into your tissue. Cancer needs a a slightly acidic environment to spread and actually has little pumps that create acid into neighboring tissue. There is an interesting study that was done on mice regarding this. In the group of mice given sodium bicarbonate in their water, the implanted cancer cells did not metastasize. The issue with taking alkaline water with meds is that certain meds need an acidic environment to digest and be absorbed. Sometimes chemo can really mess up digestion but alkaline water is as safe as eating a green salad. Hope this helps clear some stuff up.