Key Takeaways:

• Kellogg argues that humans are naturally adapted to a vegetarian, high‑fiber diet and that meat and refined foods are major causes of modern disease.
• The book links diet to colon health, digestion, and nervous system function, emphasizing the importance of bowel regularity and internal cleanliness.
• Kellogg promotes whole grains, nuts, fruits, and vegetables while denouncing overeating, condiments, and processed foods as stimulants that exhaust the body.
• Nutrition is presented as a moral project: self‑control at the table is tied to character, purity, and social progress.