The Complete Long COVID Handbook, Volume 4: Gut Dysbiosis

By Dr. Robert Groysman, MD

Long COVID continues to impact millions worldwide, leaving patients with persistent fatigue, brain fog, digestive problems, food intolerances, and systemic inflammation that refuses to resolve. One of the most overlooked yet powerful drivers of these lingering symptoms is the gut. In this groundbreaking fourth volume of The Complete Long COVID Handbook series, Dr. Robert Groysman, a physician and global Long COVID specialist, unpacks the science of post-viral gut dysbiosis.

Inside, you'll discover:

• How COVID-19 disrupts the microbiome and damages the intestinal lining.
• Why conditions such as SIBO, candida overgrowth, and histamine intolerance frequently follow infection.
• The role of the gut-organ axis in Long COVID: how microbiome imbalance affects digestion, brain clarity, mood, hormones, immunity, the lungs, heart, and more.
• How dysbiosis drives systemic inflammation, worsens autoimmune conditions, and contributes to fatigue, anxiety, pain, and even skin disorders.
• Diagnostic tools-including stool tests, breath tests, and microbiome mapping-plus how to interpret results.

Evidence-based strategies for healing:

• • Prebiotics, probiotics, and postbiotics that nourish beneficial bacteria and restore balance.
  • Dietary supports such as fibers, polyphenols, and fermented foods.
  • Advanced therapies including peptides (BPC-157, KPV), colostrum, butyrate, and fecal microbiota transplantation (FMT).

Whether you are a patient, or clinician, The Complete Long COVID Handbook: Gut Dysbiosis provides clarity and direction.