Specialties & Diseases > Gastroenterology

3 gut-friendly foods gastroenterologists love

By MDLinx staff

Published April 2, 2025

Key Takeaways

Industry Buzz

“Blueberry polyphenols in fruit and supplements induce differences in gut microbial communities and phenolic metabolism, which may alter intended health effects.” — Authors, Food & Function
“I eat two ounces of mixed tree nuts weekly…because it decreases my risk of colon cancer, improves liver health because of vitamin E, and improves gallbladder health and decreases risk of gallstones.” — Joseph Salhab, MD, a gastroenterologist

Find more of your peers' perspectives and insights below.

We all know that diet plays a major role in keeping our bodies running smoothly, but when it comes to digestive health, certain foods can really make a difference. If you’re looking to help your patients improve gut function, reduce inflammation, and support liver health, look no further than these three powerhouse foods. Joseph Salhab, MD, a gastroenterologist known for his practical and science-backed advice, has some go-to recommendations that not only support digestion but also boost overall well-being. Here’s what he’s eating—and why your patients should be too.

Mixed tree nuts

In a recent Instagram post, Dr. Salhab shared that he makes sure to eat about two ounces of mixed tree nuts every week. He said: “This food can lower your risk of colon cancer. Decrease the risk of fatty liver. Decrease the risk of gallstones. And can improve brain health.”

Nuts like almonds, walnuts, and pistachios are packed with healthy fats, fiber, and vitamin E—making them perfect for your digestive system. Research supports Dr. Salhab’s recommendation. Studies show that eating tree nuts regularly can lower the risk of colon cancer and improve liver function. ^[]

Plus, the healthy fats and antioxidants in nuts help reduce inflammation and keep things running smoothly in the gut. So, if you're not snacking on nuts already, it’s definitely worth adding them to your daily routine!

Blueberries

Blueberries are a favorite of Dr. Salhab, and for good reason. These tiny powerhouses are packed with antioxidants and fiber, which not only support brain health but also do wonders for your gut.

A study published in Food & Function highlights how blueberry polyphenols, found both in fruit and supplements, can induce changes in gut microbial communities and phenolic metabolism. ^[]

"Blueberry polyphenols in fruit and supplements induce differences in gut microbial communities and phenolic metabolism, which may alter intended health effects."

— Authors, Food & Function

So, if your patients are looking to boost their gut health, blueberries should definitely be in their fruit bowl. The fiber they contain also helps keep digestion regular, making them a great addition to a gut-friendly diet.

Coffee

Coffee lovers, rejoice! Dr. Salhab is a big fan of coffee—not just for the caffeine but for its positive effects on digestion and liver health.

Drinking coffee can actually help stimulate digestion by promoting the release of cholecystokinin, a hormone that helps move food through the digestive tract. ^[]

Plus, coffee is packed with antioxidants and polyphenols that are good for the liver. Research in The World Journal of Hepatology shows that coffee drinkers have a lower risk of liver disease and even liver cancer. ^[]And if your patients struggle with constipation, they’ll be happy to know that coffee has a mild laxative effect that can help keep things moving.

So, if you’re looking to give your patients simple yet powerful dietary tips, tell them to add mixed tree nuts, blueberries, and coffee to their daily routine. These foods not only support gut health but also help improve liver function, reduce inflammation, and even boost brain health. As Dr. Salhab puts it, small changes in your diet can make a huge difference in how you feel. Encourage your patients to start with these three foods—it’s an easy way to help them feel their best!