Hi Sam. I know what you're going through. I tried the Koufman diet for a few weeks, and it did help quite a bit. Thought it didn't get rid of the LPR completely. Maybe if I gave it more time, perhaps months, the LPR might have disappeared. The problem I had is that I just couldn't get enough calories on that low-fat diet. I kept losing weight. I'm 5'9", and I'm now about 140 lbs. I feel much better at around 150 or 155. So, like Sunbeam, I'm going to try the Fast Tract Digestion diet.
Here's my story. I've been eating healthy for the past 7 years. Lots of fruits and veggies. Lots of sweet potatoes and olive oil. And lots of lean meat and seafood. It's a paleo diet. Everything was going great until the winter of 2010-2011. I began struggling with depression (something that I've experience off and on in life). I searched around some paleo diet forums and eventually found this diet called "The Perfect Health Diet". I decided to give it a try. This was in July 2011. It's a very high-fat diet (about 65% of calories from fat, mostly saturated and monounsaturated). But it allows 400 to 600 calories from "safe starches" (white rice, sweet potatoes, etc.). So in addition to the large amounts of olive oil, I added quite a bit of butter and coconut oil. And I continued to eat a large amount of vegetables and fiber (mostly broccoli, carrots and zucchini).
Up until I tried this diet, I never had any problems with LPR ("silent reflux"). And I almost never experienced heartburn on the paleo diet. But after a few days on this really high-fat diet, I noticed a sour stomach. And then a really bitter taste in my mouth. And then, soon after that, I first noticed the sensation of having a lump in my throat. And having to clear my throat often. So I gave up that diet. The reflux mostly went away, but not entirely. The symptoms will get better for a while (though never gone completely), but then come back for a while.
So like I said, I'm going to try the Fast Tract Digestion diet. I bought the book. He recommends a diet that reduces or avoids the following types of carbohydrates: fructose, lactose, fiber, resistant starch, and sugar alcohols (like sorbitol). Obviously, we all need a certain amount of fiber; we just don't want to overdo it. These carbohydrates are not digested quickly, and so may end up feeding harmful bacteria in our intestines, leading to small intestine bacterial overgrowth (SIBO). Those bacteria belong in the colon, not the small intestine. When the bacteria munch on those difficult-to-digest carbohydrates, they produce lots of gas. This gas exerts pressure on the stomach, causing some of the stomachs contents (acid and such) to be forced up into the esophagus.
Sunbeam created a thread on the Fast Tract Digestion diet. I'm going to post my progress there.
So anyways, I understand what you're going through. I hope you find something that relieves your symptoms. I hope we all do. Hang in there!