Gut health and chronic disease (Part I): Understanding the connection

What is gut health? Key signs, clinical markers, and their impact on resilience and disease risk.

This article marks the first in a collaborative series on gut health and chronic disease by Dr. Mike Hunter, MD, a career gastroenterologist, and Kristen Deuel, an MSc candidate in Integrative Health. Together, we explore the science, clinical relevance, and practical implications of gut health, examining why it matters, how to measure it, and its impact on whole-person resilience.

Of all the health buzzwords circulating today, none attracts more interest (or more misinformation) than “gut health." The term appears everywhere: in journal articles, patient consultations, supplement ads, and wellness blogs. Yet unlike cholesterol, blood pressure, or HbA1c, there is no single biomarker that can declare a gut ‘healthy’ or ‘unhealthy.’ That is because the gut isn’t just one organ. It is a living system: a gastrointestinal tract lined by barrier tissues, powered by enzymes, and inhabited by trillions of microbes. It is an immune ecosystem that trains tolerance and defense, and a neural netwo…