Coffee, especially in excess, has numerous side effects as well:
1. Drinking coffee on an empty stomach, such as first thing in the morning, stimulates hydrochloric acid production - which should only be produced to digest meals. If your body has to make HCI more often it may have difficulty producing enough to deal with a large meal.
2. Many of the various acids found in coffee beans can irritate your stomach and the lining of your small intestine - a problem for those suffering from ulcers, gastritis, IBS and Crohn’s disease.
3. Coffee can also irritate the lining of the small intestine, potentially leading to abdominal spasms, cramps and elimination problems.
4. Acid reflux and heartburn can be caused by coffee due to the way it relaxes the lower esophageal sphincter.
5. Drinking coffee can stimulate peristalsis, the process in the digestive tract that makes us head for the bathroom.
6. Heavy coffee drinkers may have difficulty getting enough minerals in their diet, even if they eat mineral rich foods or take supplements - coffee affects iron absorption in your stomach and particularly your kidneys ability to retain calcium, zinc, magnesium and other important minerals.
7. Acrylamide is a potentially cancer-causing substance that forms when coffee beans are roasted at high temperatures.