From Symptoms to Systems: How Jona Gut Testing Transforms Clinical Decision Making
From Symptoms to Systems: How Jona Gut Testing Transforms Clinical Decision Making
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In this episode recorded live at LongevityFest 2025, a powerhouse panel gathers Dr. Leo Grady (CEO of Jona), Dr. Helen Messier (Chief Medical/Science Officer), Dr. Larry Kosinski (Gastroenterologist and Innovator), and host Dr. Lexi Gonzales to discuss the revolutionary shift from viewing gut health through a symptom-based lens to a systems-based approach. The conversation centers on how Jona, an AI-driven microbiome company, uses "Digital Twin" technology to decode complex sequencing data and predict disease risks, ranging from colon cancer to Parkinson's, before clinical symptoms appear.
Watch Episdoe HERE
Key Discussion Points
Dysbiosis Precedes Disease: Evidence confirms that microbiome signatures change before the onset of clinical symptoms in conditions like IBD, metabolic liver disease (MASLD/MASH), and Parkinson’s.
The Gut-Brain/Heart Connection: The panel discusses causal mechanisms, such as the microbiome converting dietary components into TMAO (linked to atherosclerosis) and microbes producing amyloid/alpha-synuclein that travel the vagus nerve to the brain.
The AI Advantage: With over 2,000 microbiome papers published monthly, human processing is impossible. Jona uses AI to read 220,000+ studies and match findings to a patient's specific shotgun metagenomic data.
The GLP-1 Warning: A critical look at how GLP-1 agonists (weight loss drugs) can cause a collapse in microbiome diversity, potentially setting patients up for failure when they attempt to taper off the medication.
Ancestral Diet Myths: A reframing of the "Paleo" diet—not as a meat-heavy regimen, but as a high-fiber lifestyle (100g/day) involving diverse plant matter.
Actionable Insights for Practitioners
Monitor GLP-1 Patients: Patients on GLP-1s often experience microbiome collapse. You must test the microbiome before and during the tapering process to ensure the patient has the metabolic machinery to maintain weight loss without the drug.
Screen the "Under 45s": With colorectal cancer rising in younger populations, use AI microbiome analysis to detect signatures of adenomatous polyps in patients under 45 who do not yet qualify for routine colonoscopies,
Clarify "Paleo" for Patients: Educate patients that a true ancestral diet isn't just protein; it is defined by massive fiber intake (approx. 100g/day) and variety. If food "slides down" easily, it likely lacks the necessary fiber structure.
Treat Stress as a Pathogen Trigger: Recognize that stress does not just suppress immunity; specific pathogens can "sense" host stress hormones and use that opportunity to proliferate. Stress management is a direct antimicrobial strategy.
Use Testing for Triage: For patients with ambiguous GI symptoms, use microbiome signatures to decide whether to work them up for IBD or treat for IBS, saving time and resources.
Featured Resources & Calls to Action
Tool: Jona – An AI-powered microbiome testing company utilizing deep shotgun metagenomic sequencing and digital twin technology.
Resource: Visit the Innovations in Clinical Implementation landing page for exclusive resources uploaded by Jona.
Analogies for Understanding
The "Internal Wearable": Dr. Grady explains that pathogenic organisms function like an "internal wearable" or sensor. They can detect when the host is stressed or compromised (like the immune system being down) and decide, "Now is a good time to start growing," turning stress into a direct trigger for infection.
JONA_HANDOUT_A4M_122025 (1).pdfTurn Complex Microbiome Data Into Action with Jona
Turn Complex Microbiome Data Into Action with Jona
Unlock deeper, faster clinical clarity with Jona’s comprehensive gut microbiome analysis and AI‑powered insights. Practitioners can access evidence‑based microbiome intelligence, digital‑twin simulations, and actionable protocols designed to streamline and strengthen patient care.
Next-Generation Gut Microbiome Medicine: A 6-part clinical education series presented by Jona
Next-Generation Gut Microbiome Medicine: A 6-part clinical education series presented by Jona
We’re looking forward to welcoming you to our six-part clinician education series, Next-Generation Gut Microbiome Medicine, presented by Jona.
Designed for physicians, NPs, PAs, RDs, health coaches, and clinical staff across all specialties, this complimentary series delivers concise, evidence-based insights you can apply directly to patient care.
Each part is taught by physicians and PhDs, providing practical, clinically relevant guidance grounded in the latest gut microbiome research.
For full course details, speaker bios, and registration for all or select sessions, go to: my.jona.health if you have a Jona practitioner account. If you do not, contact us at practices@jona.health
Learn more about Jona
Learn more about Jona
Dr. Helen Messier, PhD, MD, CCFP, is a physician-scientist and healthcare innovator dedicated to bridging the translational gap between biomedical data and real-world clinical care. She brings deep expertise in integrating multi-omic data and digital health technologies to advance proactive, personalized medicine. Dr. Messier holds a BSc with Honors in Genetics and a PhD in Molecular Immunology from the University of Alberta, completed postdoctoral training at the La Jolla Institute for Allergy and Immunology, and earned her MD from the University of Calgary. Board-certified in family medicine, she has served on multiple medical and scientific advisory boards, founded a national concierge medical network in Canada, and held leadership roles at Human Longevity Inc. and Viome. As Chief Medical and Science Officer at Fountain Life, she leads clinical and scientific programs and founded Fountain Life University to train practitioners and translate large-scale clinical data into publishable insights.
Dr. Lawrence R. Kosinski, MD, MBA, is a retired gastroenterologist with 35 years of clinical experience and a founding partner of Illinois Gastroenterology Group, now part of the largest GI organization in the United States. A leader in value-based care, he founded SonarMD, a care-coordination platform for complex chronic gastrointestinal disease, and continues to serve on its board. Dr. Kosinski is Chief Medical Officer of Jona, supporting the clinical translation of AI-powered microbiome science. He previously served on CMS’s Physician-Focused Payment Model Technical Advisory Committee and founded VOCnomics, which develops e-nose technology to analyze volatile organic compounds related to fiber intake. A longtime member of the American Gastroenterological Association, he recently served on its Governing Board as Councillor-At-Large for Development and Growth. He holds an MD from Loyola University Stritch School of Medicine and an MBA from Northwestern University’s Kellogg School of Management.
Dr. Leo Grady, PhD is the founder and CEO of Jona. Leo is internationally recognized for his work to deliver AI in health for over 20 years at pioneering bay area startups (HeartFlow), multinational medical companies (Siemens) and as CEO of Paige.ai. As CEO of Paige, Leo led the company to become an industry leader, internationally launching groundbreaking products and receiving the first-ever FDA approval for an AI product in pathology. Leo’s new company, Jona, has developed a unique AI and digital twin to both decode and shape the gut microbiome to significantly improve health. Leo has authored two books on AI, over 100 peer-reviewed scientific papers and is an inventor on over 300 patents. Winner of the Edison Patent Award, he was inducted as Fellow in the American Institute for Medical and Biological Engineering. Leo earned a Ph.D. in Cognitive and Neural Systems from BU.
Dr. Lexi Gonzales, ND, MS, IFMCP, is a clinician, educator, and implementation strategist working at the forefront of functional and longevity medicine. Trained in biochemistry, systems biology, and translational research, she develops practical frameworks that strengthen clinical reasoning and elevate patient care. As Senior Clinical Implementation and AI Specialist at OvationLab, she designs models and educational systems that help practitioners integrate emerging technologies with clarity and consistency. Her clinical background spans primary care within an insurance-based integrative model, multidisciplinary practice at Vida Integrated Health, and private functional medicine practice with a focus on hormonal and metabolic optimization, endometriosis, and fertility. She also served as IFM’s inaugural Medical Education Resident and later as Clinical Content Developer.
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