Life's Best Medicine: Episode 273: Martha Carlin

In a recent episode of the Life’s Best Medicine podcast, Dr. Brian Lens welcomed Martha Carlin, founder of Biotic Quest and a leading voice in microbiome research, to explore the fascinating and complex world of the human microbiome. Their conversation shed light on how trillions of microbes living within us influence our health, the development of chronic diseases, and the potential for innovative therapies.

The Microbiome: Our Internal Ecosystem

Martha Carlin opened the discussion by emphasizing a striking fact: “We are about two-thirds microbial,” meaning that two-thirds of the cells in our body are microbial, not human. This vast community of bacteria, fungi, and viruses forms an “incredible factory” producing essential vitamins, hormones, and neurotransmitters that regulate our body’s functions.

She explained how the microbiome acts as an internal pharmacy, maintaining health when balanced but contributing to disease when disrupted. “There are literally thousands of research papers on the microbiome,” she noted, highlighting its connection to nearly every major disease.

A Personal Journey into Microbiome Science

Martha’s journey began with a personal mission to help her husband John, diagnosed with Parkinson’s disease at age 44. With a background in business systems and auditing, she approached the problem by rigorously examining the evidence. She discovered that the gut microbiome plays a crucial role in Parkinson’s and other chronic diseases.

She shared, “The gut microbiome is the general ledger of the body, telling you what’s in balance and what’s out of balance.” This insight led her to found Biotic Quest, focusing on collecting and analyzing stool samples to advance microbiome research globally.

Microbiome and Metabolic Health: The Sugar Shift Story

One of the key areas Martha’s research has focused on is glucose metabolism and insulin resistance, common in Parkinson’s and diabetes. She described a clinical trial of a product called Sugar Shift, designed to support beneficial microbes that convert sugars into helpful compounds like mannitol.

The trial showed promising results: “There was a 14% drop in HbA1c after 180 days, and serum endotoxin levels dropped almost to zero.” Endotoxins, or lipopolysaccharides (LPS), are toxins from gram-negative bacteria that can leak into the bloodstream, causing inflammation and metabolic dysfunction.

Dr. Lens added valuable context, explaining how LDL and HDL cholesterol act as buffers for these endotoxins, and how their levels can reflect underlying inflammation and metabolic disease.

Balancing the Microbial Society: Raising the Good, Not Just Killing the Bad

When asked whether it’s better to wipe out harmful bacteria or boost beneficial ones, Martha emphasized a balanced approach: “We build our formulas as working systems, like a team coming in to rework the factory.” She cautioned against indiscriminate use of antimicrobials, which can harm beneficial microbes and worsen imbalance.

She highlighted the importance of fostering an anaerobic gut environment that supports beneficial bacteria like Bifidobacteria and Lactobacillus reuteri—the latter affectionately called the “love bug” for its role in increasing oxytocin and promoting tolerance.

Diet, Ancestry, and the Microbiome

The conversation also touched on ancestral diets and how they influence the microbiome. Martha shared a fascinating theory about seasonal diets of indigenous populations, such as Australian Aboriginals and the Hadza, who cycle between carnivorous and plant-based foods rich in sugar alcohols like xylitol and mannitol.

She noted, “Our ancestry isn’t all the same, so what’s ancestral for one may not be for another.” This perspective encourages personalized nutrition that respects individual heritage and microbiome needs.

Hidden Threats: Surfactants, Antibiotics, and Immune Suppression

Martha revealed lesser-known risks to gut and immune health, such as surfactants found in soaps and cleaning products. She recounted research showing these compounds can be immunosuppressive and damage cell membranes, contributing to chronic inflammation and disease.

Antibiotic overuse was another concern. Martha shared stories of patients suffering long-term gut damage after repeated antibiotic courses and stressed the importance of “putting things in place to get that microbiome back in order” after antibiotic use.

Stress, the Gut-Brain Axis, and Mental Health

The gut-brain connection was a key theme. Martha referenced the book Psychobiotic Revolution to explain how stress hormones like cortisol alter the microbiome, creating a feedback loop that affects mental health.

Dr. Lens added, “If you’re stressed all the time, your body says, ‘Bad times are coming, slow the metabolic rate down.’” They discussed how short-chain fatty acids like butyrate, propionate, and acetate—produced by gut bacteria—play vital roles in mood regulation and brain health.

Practical Takeaways and Resources

Martha’s work offers hope and practical tools for improving health through microbiome support:

• Sugar Shift: A probiotic formula designed to reduce endotoxin-producing bacteria and improve metabolic markers.
• Antibiotic Antidote: A product developed to help restore gut balance after antibiotic treatment.
• Perfect Peace: A formula aimed at calming the nervous system and reducing stress-related gut disruption.

For those interested in learning more, visit the Martha’s Quest Substack.

Final Words: Love as Life’s Best Medicine

When asked about life’s best medicine, Martha’s answer was profound: “It’s actually love. Love each other. The really hard part is loving your enemies, especially in this day and age.”

Dr. Lens echoed this sentiment, reminding listeners that emotional well-being profoundly impacts gut health and overall wellness.

This enlightening conversation with Martha Carlin underscores the microbiome’s central role in health and disease. It challenges us to rethink our approach to diet, medicine, and lifestyle, emphasizing balance, personalized care, and the power of love.

As Martha said, “I just want to help people,” and through her pioneering work, she is opening new pathways to healing and hope—one microbe at a time.