I ran into an interesting question today that examined the science around alkaline water and its advertised 'generalized health benefits' assumed to be (but incorrectly) stemming from a rise in blood pH. Logic behind the misassumption itself stemming from a rise in urine pH.
What I'm trying to figure out, is would deionized water (slightly acidic water) actually improve short term metabolic blood acidosis and ironically raise pH levels? Proposed ideas are 1) an acidic water stimulated elevation in bicarbonate secretion (kidneys and exocrine pancreas ) and reabsorption (to circulation), 2) elevated mineral resorption or 'leaching' from cells. These don't sound all that great in themselves, but regarding a short-term net effect on pH (either on urine or a hypothetical blood ph), could not deionized water have a net alkaline effect due to bicarbonate regulation and cellular reabsorption of minerals being inherently 'slower' than the near instantaneous acid-base reaction?
Alkaline metabolic products of an acidic source that may be included in water (ie lemon) do not count as justifications to an answer. Only looking at water.
If anyone has any relevant studies, feel free to share them, I can't seem to find anything outside of fish.