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-Brain Axis: How Your Brain and Digestion Connect

Kerri Rachelle

Published on: 06/08/2026

Learn how the gut-brain axis connects digestion and the brain through the vagus nerve, enteric nervous system, hormones, immunity and gut microbes.

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What Is the Gut Microbiome? Functions, Testing and Health

Kerri Rachelle

Published on: 04/08/2026

Learn what the gut microbiome is, what gut microbes do, what dysbiosis means and what microbiome testing can—and cannot—tell you about your health.

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How Digestion Works: Your Digestive System Explained

Kerri Rachelle

Published on: 03/08/2026

Learn how digestion works, including the roles of stomach acid, digestive enzymes, bile, the pancreas, nutrient absorption, motility and the gut-brain connection.

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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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