My experience with low acid causing GERD was to take Betaine HCL 
500mgs.Starting with 1 cap. 15 minutes B4 first meal, next meal take 2 caps 15 
min B4,next meal 3 B4, keep doing this until a burning peppery feeling is 
reached,then back off 1 cap.I had to reach 7 B4 I got this feeling.This 
protocol was followed until the peppery burn was experienced with less and less 
number of capsules.Now I very rarely have to take one.AND this along with a 
radical change of diet put a welcome end to GERD,and H-Pylori, the Ulcer 
causing Bacteria.
I started this treatment after talking [E-mail] with Dr. Charles Duffy of 
Dallas when he said that in 30 years of Med. practice ,he could not recall 
any patient presenting with too much acid.He said they were very deficient, 
with low to none.
The Heli-co-bacter Pylori bacteria, after burrowing into the stomach wall ,has 
the ability to surround itself with Bicabonate of Soda,thereby neutralizing 
stomach HCL.

Harold