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Home » Fix The Microbiome: #1 WORST Food For Human Gut Health: Mary Ruddick (Transcript)

Fix The Microbiome: #1 WORST Food For Human Gut Health: Mary Ruddick (Transcript)

Read the full transcript of health expert specializing in gut health and the microbiome Mary Ruddick in conversation with Rina Ahluwalia of The Primal Podcast on “Fix The Microbiome: #1 WORST Food For Human Gut Health”, August 2, 2025.

The Hidden Dangers of “Healthy” Foods: A Conversation with Mary Ruddick

RINA AHLUWALIA: If you’re dealing with some chronic issues, it could be things like pain, arthritis, inflammation, weight gain, even hormonal issues like thyroid issues. Chances are it starts in your gut. And the conventional advice about just take some fiber, take some probiotics, or just start a healthy diet, in most cases, this can make it worse.

My guest today, Mary Ruddick, is an ancestral nutritionist and she has spent time studying the world’s healthiest disease free communities. She’s traveled to the Hadza in East Africa and also studied the longest living elders in Sardinia. And she knows what modern medicine has missed. She knows what is ruining your gut and killing the gut microbiome, including the worst food in the world for human gut health.

So, Mary, my first question. What are the healthy foods that people are eating every day that is causing gut problems and inflammation?

MARY RUDDICK: Nightshades. I would say the nightshades. Everything from potato, tomato, eggplant, bell pepper, all of those.

RINA AHLUWALIA: And why are nightshades, what is it in those potatoes, bell peppers, that is so bad for the gut and so bad for our bodies?

The Problem with Nightshades

MARY RUDDICK: I think anything that we don’t feel immediately that’s a toxin is a problem. Right? So arsenic or the issues that we had with the green wallpaper and fabric in the 1800s. When we don’t feel the toxin, we assume everything is fine.

But the issue with the nightshades is that they have the lectin, which you can neutralize.