I think there is, actually.

There's a condition where the stomach can not produce enough acid (hcl) and thus cannot digest food properly, especially animal proteins. When the ph in the stomach rises, bacteria start colonising it, especially the helicobacter pylori. This can lead to painful stomach ulcers.

A plant based diet, especially brocoli, cabbages, and greens (preferably juiced) helps to reverse this condition, and lower the ph naturally.