Gut-Friendly Fats: 10 Delicious Foods That Lower Cholesterol by Feeding Your Microbiome

7. Sardines: Small Fish, Big Impact for Cholesterol and Gut

Photo Credit: Getty Images @Yarnit

Don’t overlook sardines—these tiny fish may be humble in appearance but they’re big on benefits for your gut and heart. Sardines are naturally rich in omega-3 fatty acids, matching salmon’s cholesterol-lowering impact in a fraction of the calories. What’s more, sardines' skin and soft bones provide prebiotic-like molecules that help nourish beneficial gut bacteria. Experts consider sardines to be a “whole food” source—no need for fancy preparation or supplementation. Simply add them to salads, toast, or pasta, or enjoy straight from the can with a squeeze of lemon. They’re also one of the most sustainable seafood options, making them a gentle choice for both your body and the planet. If the flavor is new for you, try pairing with bold seasonings or herbs—a little experimentation can be rewarding. Even one to two servings per week is enough to start seeing gut and cholesterol benefits, making sardines a practical addition to your routine.

8. Walnuts: Crunchy Source of Alpha-Linolenic Acid for Gut and Heart

Photo Credit: Getty Images @Yarnit

Walnuts deserve close attention when curating a heart- and gut-friendly menu. These nuts are particularly rich in alpha-linolenic acid (ALA), a plant-based omega-3 fatty acid shown to lower cholesterol and support a thriving, diverse microbiome. Research consistently finds that a small handful of walnuts per day can help decrease LDL cholesterol and provide prebiotics that beneficial gut bacteria love. Beyond their nutritional credentials, walnuts offer a satisfying crunch that brings texture and flavor to everything from oatmeal and salads to simple snack mixes. Their rich, earthy profile pairs well with both sweet and savory ingredients, adding both complexity and nourishment to your meals. Start with a small handful daily, whether plain or toasted. Even better, walnuts do more than fuel the body—they cultivate a sense of well-being that supports both your mind and your gut.

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