Contrary to what people who villify caffeine tell you, it does not seem to do any long term damage to you digestive system. There are, however, many unpleasant effect of drinking caffeinated beverages (especially large amounts) which you will make your daily trip to the loo less than enjoyable.
Increases your stomach (and body's overall) acidity
As acidic environment causes disease!
Like acid reflux, the increase of stomach acid can cause an individual significant pain. Think about the time of day in which you are usually drinking coffee: first thing in the AM, generally on an empty stomach. This is, in fact, the very worst possible time to be drinking coffee as the substance wreaks havoc on your stomach’s delicate mucosal layer. By drinking coffee on an empty stomach, this also reduces the amount of stomach acid that is intended for digesting your food later on in the day.
Drink a lot of coffee first thing in the morning on a regular basis, and gut problems may be right around the corner. It’s not just the caffeine that does this, so drinking decaf won’t avoid the danger. Caffeine and other plant-based compounds stimulate the stomach cells to release more hydrochloric acid, which can, at times, aid digestion.[1, 2] But regular coffee drinking, especially in the morning on an empty stomach, reduces the amount of stomach acid available for digestion later on. H. pylori bacteria, the main bacteria responsible for ulcers, prefers highly acidic environments. Combine this with the way coffee weakens the protective barrier of the stomach – the mucosal layer — and the risk of damage and ulcers increases.
Encourages Heartburn/Acid Reflux
No matter who you are, no one is a fan of this. Acid reflux can be a rather painful complication in the esophagus that has you reaching for those antacids which actually do much more harm to your gut than good. Coffee relaxes the sphincter muscle, which is the valve that controls the passageway for food into the stomach. Once it relaxes, it allows stomach acid to creep up into your esophagus and leave you with that painful burning sensation that can linger for hours on end.
Drink enough coffee and you may experience acid reflux or heartburn. Coffee relaxes the esophageal sphincter—the gatekeeping muscle valve that allows food into the stomach and makes sure it stays there. Stomach acid that escapes irritates the tissue of the esophagus. If it happens frequently enough, complications like sores, ulcers, or permanent changes to cells in the esophagus can occur.
Can Worsen Existing IBS & Related Digestive Disorders
Coffee intensifies symptoms of bowel conditions like gastritis, irritable bowel disorder, colitis, and Crohn’s Disease. Certain enzymes in coffee trigger an immune response that results in inflammation, bloating, cramping, gas, and diarrhea.
Increases the Chance That Food Will Rot In Your Gut
The enzymes in coffee that trigger the stomach to release its contents into the small intestine are not healthy. They work to disrupt the digestion process by not allowing the appropriated amount of time for food to first digest. As a a result, the food that is undigested and cannot yet pass sits in the gut… rotting. This is a toxic environment for breeding bad bacteria, which can spread to the intestines, damage the intestinal wall and lead to inflammation. And worse, this is what leads to those very smell, rotten egg-like farts.
Coffee’s known to encourage the stomach to release its contents into the small intestine before complete digestion has occurred. Food that doesn’t get fully digested often ends up sitting and rotting in the gut. This creates a toxic environment ideal for ‘bad’ bacteria to spread in the intestines, damages the intestinal wall, and leads to inflammation and an immune response to enzymes in the coffee.
Speeds up digestion (too much)
Truth be told, coffee makes many people run to the restroom shortly after drinking it. There are also certain enzymes found in coffee that trigger inflammation, cramping, diarrhea and gas. Anything that rapidly speeds up the elimination process is not healthy, as your body needs time to decompose and attain the proper nutrients it needs. For someone that may suffer from gastritis, irritable bowel syndrome, colitis or Crohn’s disease, coffee only intensifies the symptoms of these conditions.
Nerve and brain cells rely on a neurochemical called GABA. It’s responsible for calming the nerves after they fire. The caffeine in coffee prevents GABA from doing its job and this may lead to overactive bowels. The most common symptom is cramping or an urge to go to the bathroom.
Solution: Care for your gut. Caffeine on an empty stomach? Avoid foods that increase acidity Probiotic Don't go overboard with caffeine