In a related note - my wife had chronic vomiting for 5 years. Almost every meal would make her throw up. We went to general doctors and two gastroenterologists, who gave antacids that made the vomiting worse if anything.

One day I found an amateur website that said the issue was more likely not enough acid, gave ways to test it, and recommended drinking a tablespoon of apple cider vinegar.

My wife's vomiting stopped immediately after one dose. She recurred once or twice in the last 4 years but another dose of AC vinegar fixed it each time. Literally miraculous.