Gastroenterologists explain why the gut slows down with age and the simple, effective habits that can help keep things moving.
If it feels like your stomach has become far less cooperative with every passing year, you are not imagining things. Digestive issues tend to become more common and more complex as we age, and between 60 million and 70 million Americans are already living with some form of digestive disease, according to the National Institutes of Health. Heartburn, bloating, abdominal pain and shifts in bowel habits from constipation to diarrhea are among the most frequently reported complaints.
Pinpointing what is driving the problem is not always straightforward, since gut trouble in older adults typically results from a combination of biological changes and lifestyle factors working against each other.
How aging changes your digestive system
The gastrointestinal tract depends on a finely tuned network of nerves and muscles to keep food moving in the right direction. With age, that system can begin to lose efficiency, slowing the entire digestive process and disrupting the coordination between organs.
In the esophagus, reduced muscle coordination can contribute to higher rates of acid reflux, also known as GERD. A sluggish stomach takes longer to empty its contents, which can lead to persistent indigestion. The stomach lining also thins over time, making it more vulnerable to inflammation, gastritis and ulcers, partly because the body produces less of a hormone-like substance called prostaglandin, which helps maintain the stomach’s protective lining.
Further along the digestive tract, slowed movement in the small bowel can allow bacteria to accumulate a condition called small intestinal bacterial overgrowth which often presents as bloating and diarrhea. In the colon, sluggish motility can lead to constipation and diverticulosis, a condition in which small pouches form along the colon wall and can become inflamed or bleed.
Chronic health conditions that tend to accumulate with age including arthritis, cardiovascular disease and metabolic disorders compound the problem by limiting physical activity, which directly impacts how well the gut moves. Medications used to manage those conditions, particularly over the counter pain relievers like aspirin and ibuprofen, carry their own gastrointestinal side effects, including nausea, constipation, diarrhea and ulcers.
7 ways to support your gut as you age
The good news is that there are concrete steps you can take to ease age related digestive trouble. Here is what gastroenterologists recommend.
Chew more thoroughly. Digestion begins in the mouth. Salivary enzymes begin breaking down starch and fat before food ever reaches the stomach, reducing the workload on the rest of the GI tract. Cutting food into smaller pieces and chewing each bite at least 15 to 20 times can make a meaningful difference, especially for anyone experiencing difficulty swallowing.
Keep your mouth hydrated. Saliva production decreases with age, which affects chewing and swallowing. Dry mouth is twice as common in people who take one or more daily medications. Sipping water between bites or using an over the counter saliva substitute can help at mealtimes.
Eat more plants, fewer processed foods. A diet rich in plant-based variety and low in processed foods is one of the most effective ways to protect gut health long term. Processed foods can disturb the gut microbiome, leading to an imbalance of bacteria associated with higher rates of digestive disease. Plant-based eating also naturally boosts fiber intake, which is essential for regular, healthy bowel movements and can even help manage diarrhea by absorbing excess water.
Drink enough water. Staying well hydrated is especially important when increasing fiber intake, since fiber needs water to do its job. The National Council on Aging recommends drinking one third of your body weight in fluid ounces each day so a 150 pound person should aim for about 50 ounces, or roughly 6¼ cups, daily.
Move your body. Exercise directly stimulates GI tract motility. Even a 15 minute walk after meals can activate the stomach and improve gastric emptying. Lying down on the couch shortly after eating, on the other hand, can slow gut movement and encourage acid reflux.
Prioritize sleep. The body uses sleep to repair itself, and that includes the gut. Getting fewer than seven hours per night can compromise the gut’s protective barrier and immune function. Researchers believe that sleep deprivation may trigger low-level inflammation in the bowel, which can cascade into digestive symptoms.
Take medications correctly. Every medication carries potential GI side effects, including drugs prescribed specifically for digestive conditions. NSAIDs should never be taken on an empty stomach, and acid suppressive medications are most effective when taken 30 minutes before breakfast. If side effects arise regardless, it is worth flagging them with a doctor.
When to see a gastroenterologist
While many digestive changes are a normal part of aging, it is still important to discuss any new or persistent symptoms with a doctor rather than assuming they are harmless. Symptoms that warrant a prompt consultation with a gastroenterologist include trouble swallowing, unexplained weight loss, persistent abdominal pain, nausea or vomiting, and blood in the stool or stool that appears black and tarry.
