I am not sure, but bread may help to absorb the excess acid. Please read on, though, that is not all you can or should do...
First, be sure you don't overeat. We need to know when to eat. A lady I went to said your hunger-satiation range is one to ten. Learn to eat when your hunger is no lower than 3-4 and eat only until you feel a fullness level of 6-7. Don't wait until you're starved and don't stuff yourself. To do this until your brain realizes the levels, try to eat a little bit -- I'd say 2 tablespoons worth of something -- every three to four hours, or even every two hours. When you sit down to a meal, eat very slowly, chewing carefully. This isn't because you are wolfing down your food now, but because it takes time for the nerves that register "full" in your tummy to get the full message to your brain, and for the brain to realize your tummy is actually full enough. If you go away from a meal and feel stuffed in 10 to 20 minutes, you may have eaten too quickly and definitely overate. Overfilling the tummy almost always caused some acid reflux -- heartburn as many people know it -- for those of us who suffer from it.
Second, I also cut back, but didn't eliminate, fats when I had this problem. If you put oil, a fat, in water, it floats. Same is true in the stomache.
If you have a hyetal hernia, you may have to take the pharma stuff for a time. If you don't get this under control, surgery may be required. I got mine under control, using meds, then learning the other steps to keep it under control.
I hope this helped a little. I paid handsomely for some of this info, the rest is from experience. Acid reflux isn't fun and can be quite serious. You may have to take pharmacuticles for a time to avoid injuring your esophagus and/or allowing it time to heal. Like me, after a time, you can quit the prescription meds and get along fine. But protect your esophagus at all costs. Letting this go on can cause some really nasty problems, like esophageal cancer from the constant irritation.
Been there, done that!