“If the ACV contains this alkaline ash it would have to neutralize the acid already in the ACV, therefore in order for it to improve the acidity in your stomach it would have to be a alkaline solution and it wouldn’t be a vinegar at all.”
I don’t know about diluting the acid in your stomach but all foods make the body more or less acidic — to one degree or another. I would expect that to have more of an effect than any change in the amount of stomach acid.
vinegar is acetic acid. period.