I am working on a book on alternative cancer therapies right now. Among other things i am covering are the fact that cancer cells actually rely on alkalinity to survive and proliferate. Check the medical journals, this is also well known.
I took a PH test today and found it to be 5.75, which is quite acidic due to high intake or animal protein.
Both testing of urinary or salivary pH as an indicator or blood pH is also a myth that I addressed in this old post:
As pointed out diet has very little actual effect on pH. What is interesting though is that the metabolism of olive oil actually leads to the production of carbonic acid. So if people want to claim that the "liver flushes" promote alkalinity I would love to see some evidence of this or at least a reasonable explanation of how.