10/13/2026
🌱 Prebiotics: Are You Feeding Your Gut Bacteria?
You’ve probably heard that fiber is important for gut health. But did you know that certain types of fiber and other compounds in plant foods help nourish the beneficial microbes living in your gut?
These substances are called prebiotics.
Think of prebiotics as fertilizer for your gut garden. Just as fertilizer helps plants grow, prebiotics provide nourishment that helps certain beneficial gut microbes thrive and do their job.
Why does this matter?
When gut microbes ferment certain fibers, they break them down and use them for energy, producing compounds called short-chain fatty acids, including butyrate.
These compounds help support the cells lining your colon and play a role in immune and metabolic health.
🥦 Where can you find prebiotics?
You may already have some of these foods in your kitchen!
🥣 Oats and beans: Provide fermentable fibers that gut microbes can use.
🧅 Onions, garlic and asparagus: Contain inulin and other fermentable carbohydrates.
🍌 Green or slightly underripe bananas: Provide resistant starch, a carbohydrate that resists digestion in the small intestine and can be used by gut microbes.
🥔 Cooked-and-cooled potatoes or rice: Can contain resistant starch, too.
🫐 Berries and other colorful plant foods: Provide polyphenols and other compounds that interact with gut microbes, influencing which microbes thrive and the compounds they produce.
🌿 Remember: Variety matters!
In my recent post, I shared the goal of eating 30 different plant foods per week. Different plants provide different types of fiber and other compounds, which is one reason I encourage variety rather than relying on the same one or two foods.
You don't need to reach 30 plants overnight. Start by adding one new plant food to a meal or snack, or rotating the foods you already enjoy.
A gentle reminder: If you experience bloating, gas or IBS symptoms, increase fermentable foods gradually. Foods such as onions, garlic and beans can cause more gas and bloating in some people because gut bacteria ferment them. These foods can still be nutritious, but the amount you tolerate may vary.
The goal isn't perfection—it's building variety in a way that works for your body.
🌱 Your Healthy Selfie challenge: What's one new plant food you could add to your meals this week?
Small changes, repeated consistently, can make a difference over time.