Mona SharmaCelebrity nutritionist and wellness advocate

Eat the Rainbow | The Fiber Secret for a Happy Gut Microbiome

29 Nov 2025 · 1 min

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In this video, Mona Sharma explains that dietary fiber is crucial for a healthy gut microbiome because beneficial microbes feed on fiber. She highlights that fiber from polyphenol‑rich, colorful fruits and vegetables—what she calls “eating the rainbow”—provides the best quality fiber. By increasing intake of these colorful produce items, listeners can naturally nourish their gut microbes without needing probiotic supplements.

Chapters

And then, of course, the foods. Right? So foods are essential. And I think the greatest thing that I love that's starting to trend right now is fiber. Fiber is essential to an optimally functioning gut. Why? Because the good, healthy, happy microbes within our gut microbiome, they thrive on this fiber. It's their food to thrive. So without even taking a probiotic, if you can increase your good quality fiber from polyphenol rich foods that have lots of color, I'm talking about fruits and tons of vegg. Eat the rainbow. Focus on eating just as much produce as you can those types of veggies. And that fiber is going to fuel the good microbes within the gut microbiome. And.