I tried it once and it appeared to work. I rarely get heartburn so I can't really say anything except it seemed to work the one time I used it. The idea behind it seems solid though. You heartburn occurs because there is not enough acid in the stomach, not because there is too much. I don't have a source but I read once that when people with GERD are tested for acidity in their stomach, they almost always have poor acidity, yet they are constantly getting heartburn. Also heartburn occurs and older people not younger people, yet acid production in the stomach declines with age.