I saw this article and wanted to share it with you, as acid blockers are very commonly used: http://well.blogs.nytimes.com/2012/06/25/combating-acid-reflux-may-bring-host-of-ills/
The article doesn't mention that we produce less acid as we age, so it's possible that the problem isn't that there's too much acid, but that there's not enough. There are natural supplements/remedies for that, and probably for too much acid as well.