You've probably heard a lot about gut health lately.
New research shows what happens in your gut affects everything from your mood, energy, and immune system to how well you age.
Growing research shows a direct correlation between gut health and a host of physical ailments, as well as its close ties to emotional and psychological well-being. Cara Marrs, a registered dietitian nutritionist at UCHealth, says many in her field refer to the gut as "the second brain."
“When your gastrointestinal system is working as it should, it helps create a better balance that affects our entire body,” she said.
For older adults, that means staying healthier and potentially even living longer.
Trillions of microbes living in your digestive tract fight harmful pathogens, make important chemicals like vitamin K, and may influence your resistance to illness, heart health, and cancer risk.
Research from Harvard Health found older adults whose gut microbiome diversity changed the most over time tended to live longer. They also had lower cholesterol levels and faster walking speeds.
Improving your gut health doesn't require an overhaul of your life. A few targeted gut health hacks can make a real difference.
Your gut microbiome shifts throughout your life.
A healthy microbiome has between 250 and 300 different species of bacteria, while low diversity is associated with health issues such as inflammatory bowel disease and type 2 diabetes.
Medications, reduced appetite, less varied eating, and changes in digestion can all affect the balance of your gut microbiota as you age. The result for some people is a body that's working harder to absorb nutrients, manage inflammation, and maintain good bacteria levels.
Much of what shapes your gut microbiome comes down to lifestyle, which means one of the keys to staying healthier is within your control. These tips can help.
Diet is the most powerful lever you have for gut health.
Eating well when you’re cooking for one can feel like more effort than it's worth, but with a little planning, it doesn’t have to be complicated.
Eating at least 30 different types of plant foods each week is linked to a more diverse gut microbiome and better overall health. That sounds like a lot until you realize it includes everything in your pantry — oats, almonds, black beans, a handful of frozen peas, a banana with your morning yogurt.
A diverse diet helps your gut grow more types of good bacteria, making it easier to handle whatever comes along. Cleveland Clinic gastroenterologist Dr. Christine Lee recommends aiming for a wide range of colors on your plate — greens, reds, oranges, yellows, purples — since color variety generally signals nutrient and fiber variety.
A few practical strategies if you don't always feel like cooking:
Just as some foods support a diverse gut microbiome, others work against it.
Preservatives in processed foods slow digestion and let harmful bacteria build up, while fried foods can lead to indigestion, gas, and poor gut health.
Ultra-processed foods and diets high in sugar can reduce the number of beneficial bacteria in your gut, disrupting the balance your digestive system depends on.
Artificial sweeteners like sucralose and aspartame can also disrupt gut microbiome diversity and may interfere with the body's ability to regulate blood sugar levels. Switching to plain sparkling water or diluted fruit juice instead of diet sodas is a small swap that can have a big impact.
It’s also a good idea to limit alcohol because physicians warn drinking too much can cause inflammation and make it more difficult to digest food. It can even damage the lining of your intestines, causing “leaky gut syndrome.”
Rather than giving yourself strict limitations, develop a habit of choosing whole foods more often than processed ones.
Your gut and your brain are in constant conversation.
What you feel, your gut registers, and what happens in your gut affects your mood.
Chronic stress triggers the release of hormones that can damage your gut lining, letting harmful bacteria and toxins affect your system. People often assume food is behind gastrointestinal issues when stress is the real culprit.
Managing stress through daily practices like a short walk, yoga, or even sitting with a cup of tea and a good book can support your gut health over time.
Sleep matters just as much.
Your gut microbiome has its own circadian rhythm, and not getting enough quality sleep can interfere with this internal clock, leading to bacterial imbalances. Research also shows that better sleep is linked to increased gut bacteria diversity. At the same time, not getting enough sleep or getting poor sleep quality can create changes in your gut in as little as two days.
You don't need an intense fitness routine to support good gut health.
According to Harvard Health, regular exercise promotes gut microbiome diversity, possibly by changing the rate at which material moves through the intestines or by reducing inflammation in the gut.
Moderate, consistent movement like a daily walk or a cycling class helps diversify your gut microbiota and supports overall digestive health.
It can also help you sleep better.
For more tips on how to start an exercise routine that sticks, check out this post.
Water keeps your digestive system moving. Drinking at least eight glasses of water each day helps fiber move smoothly through the digestive tract and prevents constipation.
If you want something other than plain water, try herbal tea or fruit-infused water.
The water in fruits and vegetables like cucumbers, oranges, and melons also counts toward your daily total — another reason to eat a variety of plant-based foods.
Your gut microbiome is working for you around the clock to break down food, communicate with your brain, and keep you healthy.
Making small changes over time can improve your gut health and keep you healthy and independent.
Kendal at Home helps older adults build the plans and support systems that make healthy, independent living sustainable.
Download our free guide, How to Live Well at Home: Your Guide to Healthy Aging, for practical guidance on nutrition, wellness, and staying well at home as you age.