Out of curiosity: since the contents of the stomach are highly acidic, so the food that goes in gets broken down by enzymes (and I would think brought to pretty much a uniform ph) how does is matter what the ph is of the food you eat, unless you are eating nothing but super low ph foods?
A scan of
ph of common foods shows that most are below 7.
The ph of the stomach is generally under 3.
As I recall, OSensei's diet included liberal amounts of salt water, NOT to be recommended.