Gut Health Basics: What the Research Actually Supports

The reasonable case for gut health

Your gut influences immunity, mood, hormone metabolism, and inflammation. That doesn't mean every probiotic on the shelf will change your life.

Evidence-supported foundations

• 30+ different plants per week for microbial diversity
• Adequate fiber (25–40g/day) from whole foods
• Fermented foods 3–5x per week
• Minimizing ultra-processed foods and unnecessary antibiotics

When to test

Comprehensive stool testing is useful for persistent GI symptoms, autoimmune concerns, or unexplained fatigue. It is not a screening tool for asymptomatic adults.

What to skip

Expensive "detox" cleanses, single-strain probiotics marketed for weight loss, and anything sold with fear.