High-Fiber Diet

Dietary fiber, found in plant foods, resists digestion in the small intestine, reaching the large intestine where it is fermented by gut microbiota. This process produces short-chain fatty acids (SCFAs) that benefit gut barrier integrity, immune function, and systemic metabolism. A high-fiber diet improves satiety, stabilizes blood glucose, reduces cholesterol absorption, and promotes a diverse, healthy gut microbiome, contributing to reduced risk of chronic diseases and extended healthy lifespan.

Verdict

Foundational for gut health, metabolic regulation, and longevity; low risk.

Protocol

• Adults typically aim for 25-38 grams of total dietary fiber daily, prioritizing soluble and insoluble sources from diverse whole plant foods.

Flags

• Gradually increase intake to avoid gastrointestinal discomfort (bloating, gas).
• Ensure adequate hydration when increasing fiber intake.
• Individuals with certain digestive conditions may require specific fiber types or amounts.