serious? thats it?
"Coffee tends to speed up the process of gastric emptying, which may result in highly acidic stomach contents passing into the small intestine more rapidly than normal. This may lead to injury of the intestinal tissue"
H. Glatzel and K. Hackenberg, Effects of Caffeine Containing and Decaffeinated Coffee on the Digestive Functions: X-ray Studies of the Secretion and Peristalsis of Stomach, Intestines and Gallbladder, Medizinische Klinik, April 21, 1967;62(16):625-28.