Your Gut Problems After COVID Aren't Just Digestive. They're Driving Everything.

COVID-19 doesn’t stop at the lungs. Your gut contains more immune cells than any other part of your body, and when the virus disrupts the microbial balance there, the consequences ripple outward — triggering inflammation, confusing your immune system, and allowing toxins to leak into your bloodstream. Dr. Groysman has seen this pattern in patient after patient: the bloating, the new food intolerances, the brain fog that worsens after eating. This book explains the mechanisms behind these symptoms and gives you a clear path to recovery.

Volume 4 covers the full landscape of gut disruption in Long COVID, from the loss of protective butyrate-producing bacteria to the overgrowth of harmful organisms in places they don’t belong. You’ll learn why conditions like SIBO and candida overgrowth are so common after COVID, how biofilms protect these organisms from treatment, and why simply killing bad bacteria without rebuilding the ecosystem leads to temporary relief at best. The book walks you through breath testing, stool analysis, and lab markers so you can work with your doctor from a position of knowledge.

The recovery section is where this book becomes a hands-on guide. Dr. Groysman lays out a structured plan for rebuilding your microbiome — the right fibers, prebiotics, and probiotic strains (including which ones to avoid if you have histamine intolerance or SIBO), gut-healing supplements like glutathione and lactoferrin, and dietary strategies that actually work for sensitive systems. The gut is one of the most adaptable systems in the body. With the right approach, it can heal.