Covers the basics from a classic medical perspective. No mention of leaky gut, damaged gut, probiotics, etc.
The topics covered are:
Chapter 1 Americans & digestion: talks about lifestyle issues (briefly! - also, also from current medical "wisdom" with advice such as animal fat is unhealthy), how digestions works (7 pages, 1 of which is a helpful labeled pictured), and how to keep the digestion on track (again, covering the typical medical advice such as the food pyramid with veggies, fruits, and carbs taking the majority, serving sizes, advice in reading labels, eating plenty of fiber, exercise, water, appropriate BMI).
Chapter 2 Goes through various symptoms and their possible diagnosis as well as the appropriate chapter in the book.
Chapter 3 Explains various tests for various intestinal difficulties, including blood work, urine samples, xrays, upper endoscopy, colonoscopy, etc., explained simply and briefly, many with pictures.
Chapters 5-14 cover the following diseases: Gastroesophageal reflux diseases (GERD), Ulcers and stomach pain, Irritable Bowel Syndrome, Crohns disease and ulcerative colitis, celiac disease, diverticular disease, gallstones, pancreatitis, liver disease and cancer of the digestive organs. All chapters are relatively brief, most under 10 pages. Most simply go through the disease, symptoms, medical treatment options and a bit of lifestyle and food needs for the condition but only barely.
This would be best of an absolute beginner in understanding their basic health or one of the above mentioned diseases, perhaps before diagnosis is made for a certainty or for someone to begin to piece together their symptoms. Everything is written on a simple level for the lay person with lots of labeled pictures. A basic, straight, traditional medical approach.