Will alkaline water and foods help prolong the life of a liver cancer patient stage 4? what could be done to the patient without any further treatment

No change: Alkaline water is no better different than bicarbonate (sodium bicarbonate) added to your water but it is expensive. I am sorry to hear about stage 4 liver cancer. Talk to your doctor about any research for patients with your type of cancer and if the nih is offering trials for nutrition in cancer. Talk with family members about goals and expectations in an open manner and expect more than one discussion.

Minimal effect.: Alkaline water will do nothing. Stage 4 liver ca patients should generally consider palliative and comfort care under the guidance of their doc. Palliative care is the specialty of medicine that deals with comfort, pain control and dignity at the end of life.