I spent 2 years fighting acid reflux. I ate antacids like candy til the doctor put me on Zantac, then I started taking those like candy. Finally, my pastor gave me some dried mint leaves and told me to steep 1 teaspoon in a cup of water and drink. One cup a day for a week. By the second day I hadn't had an attack. By the end of the week I threw away my Zantac. The tea was only used for a week as it was. After about 1 month the erosion was healed and it would be 4 years before I would have heartburn again. I drink the tea and have no more problems. I use vinegar once or twice a year if I get heartburn again but the tea did a total turn around. None of my doctors believe I used to have acid reflux. Note: the mint used can even be the kind you find on the spice rack at the local grocery store.
I have heard of mint juice as an Indian remedy. Haven't tried it though.
I just did my science fair project on this subject and got a 1st, and Best of Show. I found that peppermint will actually lower the acidity in your stomach. Like a mint (like peppermint candy) or peppermint tea will help lower the acid in your stomach that produces the acid that gives you heartburn.