REV0lution Health Library

Evidence-informed articles on nutrition, metabolism, hormones, digestive health, fitness, recovery, lab testing, and functional medicine.

Gut Health
IBS, bloating, GERD, constipation, gut health
Hormones
PCOS, perimenopause, menopause, cortisol
Thyroid Health
Hashimoto's, hypothyroidism, thyroid labs
Metabolic Health
Insulin resistance, blood sugar, weight loss resistance
Autoimmune Disease
Autoimmunity, inflammation, immune regulation, root-cause support

Advanced Lab Analysis
Functional testing, blood chemistry, GI-MAP, DUTCH, OAT, and lab interpretation
Fitness & Recovery
Strength, movement, sleep, recovery, performance, and resilience
Functional Medicine
Root-cause care, systems thinking, symptom patterns, and whole-person health
Nutrition & Performance
Protein, fueling, body composition, exercise nutrition, and metabolic health

Understand your health. Backed by science.

Gut Health and the Immune System: How They Connect

Kerri Rachelle

Published on: 05/08/2026

Learn how the intestinal barrier, microbiome, GALT and secretory IgA interact with immunity—and why not every immune condition begins in the gut.

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What Is Leaky Gut? Intestinal Permeability Explained

Kerri Rachelle

Published on: 05/08/2026

Learn what leaky gut means, how intestinal permeability works, which conditions affect the gut barrier and why symptoms or zonulin tests cannot diagnose it alone.

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What Is Gut Health? Digestion, Microbiome & More

Kerri Rachelle

Published on: 03/08/2026

Learn what gut health means, how digestion, the microbiome, intestinal barrier and gut-brain axis work—and when digestive symptoms need evaluation.

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