Seaworthy Functional Medicine: The Microbiome's Link to Parkinson's and Neurological Disease with Martha Carlin | Field Notes

In a compelling conversation on the Seaworthy Functional Medicine podcast, Dr. Rob Downey interviews Martha Carlin, a pioneering microbiome expert and founder of the BioCollective. Inspired by her husband’s Parkinson’s disease, Martha embarked on a journey into functional medicine and microbiome research, uncovering profound connections between gut health and neurological diseases.

Key Insights from Martha Carlin:

• The Microbiome as a Central Player in Health
  Martha emphasizes that humans are “so much more microbial than we are human,” highlighting the microbiome’s critical role in producing vitamins, hormones, and neurotransmitters essential for overall health. Damage to this ecosystem—often caused by antibiotics, food preservatives, and chemicals like glyphosate—can lead to inflammation and chronic diseases. She notes, “When [the microbiome] gets damaged by antibiotics... it starts to get these gram-negative bacteria that produce endotoxins that cross over and cause inflammation anywhere.”
• Microbiome and Parkinson’s Disease
  Research has revealed distinct gut bacterial profiles linked to Parkinson’s symptoms such as tremors and gait issues. Martha shares a breakthrough moment: “Parkinson’s has two primary types... Dr. Philip Sheeran showed that you could basically segment those two different categories by the gut bacteria. That was such a Eureka for me.” This insight fueled BioCollective’s extensive biobank and research efforts.
• Innovative Product Development: Sugar Shift
  Martha developed Sugar Shift, a product designed to convert excess dietary glucose and fructose into mannitol—a sugar alcohol shown in animal models to reduce protein aggregation in the brain and improve mobility. Remarkably, her husband experienced significant improvement, “within 30 days he was no longer walking with a cane.” Clinical trials further demonstrated Sugar Shift’s benefits, including “a 14% reduction in HbA1c and significant reductions in serum endotoxin levels” in a diabetes cohort.
• Systems Biology and Terrain Theory
  The conversation underscores the importance of viewing human physiology as an ecosystem rather than a machine. Martha likens restoring gut health to farming: “If you bought a farm that was overgrown with weeds... you have to address the weeds first and prepare the ground so it can accept and rebuild the healthy microbiome.” This approach aligns with functional medicine’s focus on individualized care and the body’s innate ability to heal when the terrain is restored.
• Challenges in Conventional Medicine
  Martha and Dr. Downey discuss the cognitive dissonance many conventional physicians face when integrating microbiome science into practice. Martha recounts difficulties in getting referrals for specialized care despite compelling microbiome data, highlighting the need for more practitioners trained in functional medicine to guide patients effectively.
• The Impact of Environmental Toxins
  A significant concern is the widespread presence of glyphosate (Roundup) and its detrimental effects on beneficial gut bacteria. Martha explains, “Glyphosate is patented as an antibiotic... it is more detrimental to lactobacillus and bifido bacteria that are very important for our microbiome health.” BioCollective includes glyphosate-resistant strains in their formulas to help remediate this damage.
• The Gut-Brain Axis and Emotional Health
  The dialogue touches on microbial endocrinology and the gut-brain connection, noting how stress and emotions influence gut microbiota and vice versa. Martha references pioneering work showing that “many neurotransmitters are made in the gut by bacteria,” creating feedback loops that affect mental health and disease progression.
• Final Thoughts and Resources

Martha encourages those interested in exploring their microbiome to work with knowledgeable functional medicine practitioners to avoid potential harm from self-directed interventions. Her work and products are accessible through:

• The BioCollective: thebiocollective.com
• Biotic Quest products, including Sugar Shift
• Martha’s personal blog: Martha’s Quest

This conversation offers a hopeful and scientifically grounded perspective on how nurturing our internal microbial communities can profoundly impact neurological health and beyond. As Martha beautifully puts it, “What we do out there is not out there—it’s in here,” reminding us that healing begins within.