This Is A Gastroenterologist's Top Ingredient For Gut Health + 5 Ways To Use It

All that to say, it's much easier to choose a top-tier ingredient from each food category. So for now, let's highlight healthy nuts and seeds: If he had to choose one, Singh considers walnuts a gut-supporting star. Here's what makes them so gut-friendly and (bonus!) a bunch of recipes to try. 

And aside from their gut-supporting benefits, walnuts are also top-notch for longevity: A study conducted by researchers at the Harvard T.H. Chan School of Public Health even suggests walnuts can help you live longer by approximately 1.3 years! 

But for those who love a little recipe inspiration (who doesn't?), we grabbed some of our favorite walnut-based meals below: 

In terms of comfort food, you can't go wrong with this vegan lentil-walnut baked ziti. The walnuts and lentils add not only hearty protein but a satisfying crunch to the dish—and the homemade sauce is bright and flavorful. The best part? It takes only one pot to make. The most difficult task will be choosing which pasta to use as your base. 

"Olive oil cakes are a classic in Italy, but here there's no flour, no sugar, and nothing artificial," says cardiologist Steven Gundry, M.D., of his healthy alternative. The walnuts give the cake a nice crunch, while the warming spices will make your kitchen smell like heaven. "For an extra-special treat, spread a little coconut whipped cream on your cake—it is positively decadent!" he adds. 

You've heard of peanut butter and almond butter—what about walnut butter? With its high omega-3 content, walnuts certainly make for a super spread. We especially love this colorful, dreamy option from Butterfly, which has a nutrition bonus from blue spirulina, but you can find all of our favorite nut butters here. 

This meatless "ground beef" is packed with fiber: Oats, for example, offer 8 to 16 grams per cup, and mushrooms, walnuts, and chickpeas are all good sources, as well, to help promote better gut health and digestion. And let's not forget about those king trumpet mushrooms, which have a number of health-supporting antioxidants. These crumbles are also so easy to prep; you can have them ready to use for anything from tacos to a vegan Bolognese sauce.

For a no-fuss, hearty breakfast, this nutty granola is a surefire winner. Packed with walnuts, almonds, and cashews, it's filled with protein and healthy fats—it may quickly become a regular part of your weekly routine. Sprinkle your granola over a coconut yogurt bowl with a drizzle of strawberry compote, and you won't be disappointed.

Thanks to their gut- and longevity-supporting health benefits, walnuts are a worthy add to your regular eating plan. Plus, they're pretty versatile in both sweet and savory recipes. Enjoy!