My DH was taking Zantac pretty much daily to control his heartburn and reflux symptoms and they pretty much disappeared within a few days of starting low carb and only return when he decides to go off low carb for a special occasion such as a holiday or birthday. He's not as overweight as I am nor does he have diabetes, so he can afford to do that once in a while.
Before low carb, he and his doctor blamed coffee and fried foods for his stomach problems. It's interesting to note that as long as he's low carbing he can drink all the coffee he wants and eat high fat and not have a problem. The second he adds bread, pasta, rice or potatoes into the mix, he's running for the Zantac again.