Interesting, didn't know that and I've been drinking massive amounts of milk lately. Weird though as it hasn't caused acid problems for me, just bloating, excess gas, sometimes diarrhea. I've had gastrointestinal issues for at least the last 5-6 years and have given up foods that can make me sweat like mad and feel nauseous, eg. overly spicy foods, all sodas, things with too much caffeine, etc. I actually did feel relatively better when I was taking protein pump inhibitors but got lazy and they were expensive. The last doctor I asked about my gastrointestinal issues said it was due to stress, which conflicts with what this site says: http://www.umm.edu/digest/ulcers.htm.