Maybe I should preface this post by saying that as someone with qualifications in a hard science, I am very cynical indeed about what I view as crackpot science - chrystals, reike, homeopathy, vegetarianism. In short if Prince Charles approves, I know its nonsense.
So here I am recommending something. Kefir. I was given a plant by a German woman in the Canaries and she took no hostages. So I tried it and it really does seem to have settled my turbulent stomach. Michale Mosley investigated it and the report is here
http://www.bbc.co.uk/news/health-38800977 . Something to do with probiotics.
You put the plant ( mine is called Kevin!

Well you lot give names to cars!) in milk at about 20C and 24 hours later you have something that looks very much like yoghurt. It isnt yoghurt - its actually fermented milk of the sort they drink in the Caucasus. I bung it on the morning muesli. And a few days later the stomach started to feel better with less reflux and no pain. Might be co-incidence but Mosley suggests not.