If you work on the basis that gastroesophageal reflux is carbohydrate poisoning, you would expect a LC diet to provide remission of symptoms. Just reading through the abstract of this paper from g, that would appear to be the case. Six days is a pretty short period to sort our GERD and no doubt there would be further improvement with time. The other tweak would be gluten elimination, not that much would be coming through at 20g of carbs per day.
This goes nicely back-to-back with another paper which has been lying around on my hard drive for some time. There is a fairly large literature as to why exercise results in an omprazole deficiency in athletes, with lots of ideas floated around about pressure changes, hormones etc. I think it's reasonable to describe many endurance athletes, the ones worst affected, as indulging in "carb loading". Apart from furring up their coronary arteries with sugar, GERD would seem be (yet) another price that must be paid by athletes for this practice. I'm glad so say that I have no personal experience of GERD, though my wife could write a book bout it.
BTW Nice to see Grete Waitz doing well.