John J. Herbert, DC is a retired chiropractor, educator, and health researcher with more than four decades of experience studying the underlying causes of chronic fatigue, dysautonomia, and stress-related disorders. A graduate of Palmer College of Chiropractic (Class of 1980), Dr. Herbert spent years studying patients whose symptoms did not fit neatly into conventional diagnostic categories.
Throughout his career, Dr. Herbert observed a recurring pattern among patients suffering from persistent fatigue, brain fog, exercise intolerance, anxiety, and autonomic dysfunction—many of whom were told their labs were “normal” despite clear functional impairment. This long-standing clinical paradox became the foundation for his research into subclinical adrenal insufficiency and its relationship to modern fatigue syndromes.
Now retired from active practice, Dr. Herbert focuses on education and writing, translating complex physiology into clear, patient-centered explanations. His work bridges the gap between traditional endocrinology, functional medicine, and real-world clinical observation, offering a fresh perspective for patients, clinicians, and researchers alike.
The Hidden Epidemic challenges the conventional understanding of adrenal health and fatigue-related illness. Rather than focusing
solely on rare, end-stage conditions such as Addison’s disease, this book explores a functional gray zone—a state in which the adrenal
glands may technically test within “normal” ranges yet fail to meet the body’s ongoing demands.
Drawing from years of experience, current medical literature, and physiological principles, the book explains why many patients fall through the cracks of standard testing—and what can be done to recognize and support recovery earlier, before full adrenal failure occurs.
Unlike alarmist or oversimplified approaches, The Hidden Epidemic emphasizes gentle, evidence-informed strategies, including low-exertion movement, nervous system regulation, lifestyle modification, and careful avoidance of overstimulation during recovery. The goal is not quick fixes, but restoring resilience in a body that has been pushed beyond its adaptive limits.
Latest announcements, research highlights, and educational updates related to The Hidden Epidemic and adrenal health.
Real feedback from readers and professionals highlighting the clarity,
balance, and clinical insight behind The Hidden Epidemic.
A clear and clinically grounded explanation of fatigue syndromes that are often misunderstood.
This book fills an important gap between standard testing and real patient experience.
A balanced and educational approach that avoids quick fixes.
Highly valuable for readers seeking credible, practical insight.
Thoughtful, well-researched, and easy to understand.
It helped me make sense of long-standing fatigue and stress issues.
This book offers clarity without fear or exaggeration.
A reassuring guide for anyone struggling with chronic fatigue or stress intolerance
A clear and clinically grounded explanation of fatigue syndromes that are often misunderstood.
This book fills an important gap between standard testing and real patient experience.
A balanced and educational approach that avoids quick fixes.
Highly valuable for readers seeking credible, practical insight.
Thoughtful, well-researched, and easy to understand.
It helped me make sense of long-standing fatigue and stress issues.
This book offers clarity without fear or exaggeration.
A reassuring guide for anyone struggling with chronic fatigue or stress intolerance
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