Evidence-based gut health

Your gut is trying to tell you something.

Evidence-based guides on the microbiome, probiotics, IBS, leaky gut, and the science of digestive health. Written for curious people, cited from real research.

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Essential Reading

Healthy eating for gut-brain connection

The Gut-Brain Axis Explained: How Your Microbiome Shapes Your Mood

95% of serotonin is made in your gut. Here is the science of what that actually means for anxiety, depression, and mental clarity.

Fermented foods for gut health

Fermented Foods and the Microbiome: What the Science Really Shows

Kimchi, kefir, sauerkraut—ranked by clinical evidence. Which fermented foods actually move the needle on gut diversity.

Probiotic supplements

Best Probiotics by Strain and Condition: A Buyer's Guide That Actually Helps

Most probiotic labels are meaningless. Here is how to read the strains, match them to your condition, and avoid expensive placebos.

Just Thrive Probiotic — our top-rated pick Spore-based strains that actually survive stomach acid. Independent third-party tested. Trusted by functional medicine practitioners.

The library

All 151+ Guides

67 guides

What Is Leaky Gut and Does It Actually Exist?

Best Probiotics by Strain and Condition

The Gut-Brain Axis Explained

Foods That Destroy Your Microbiome

How to Test Your Gut Microbiome at Home

IBS vs IBD: What Is the Difference?

Postbiotics: The Next Frontier in Gut Health

Alcohol and the Gut Microbiome

Barrett's Esophagus, GERD, and the Microbiome

Best Fiber Supplements for Gut Health

Best Probiotic Brands Compared

Best Probiotic for IBS

Best Probiotic for Women

Seed vs Garden of Life vs Thorne Probiotic

Bile Acid Malabsorption and Chronic Diarrhea

Bile Acids and the Gut Microbiome

Bloating: Causes and Evidence-Based Solutions

Butyrate and Short-Chain Fatty Acids Explained

Candida Overgrowth and Gut Dysbiosis

Celiac Disease: Diagnosis and Gut Healing

Chronic Constipation: Motility, Fiber and Treatment

Circadian Rhythm and the Gut Microbiome

Colorectal Cancer Screening: A Complete Guide

Crohn's Disease: Microbiome, Diet and Treatment

Dietary Fiber Types: Prebiotic, SCFA, Resistant Starch

Digestive Enzymes: Do You Actually Need Them?

Diverticulitis, Diverticulosis and the Microbiome

Elimination Diet: Food Sensitivities and Reintroduction

Fecal Microbiota Transplant (FMT) Explained

Fermented Foods and Gut Health

Fiber, the Microbiome and Butyrate

Functional Dyspepsia: Causes and Treatments

Gallbladder, Bile Acids and the Microbiome

Garden of Life vs Thorne Probiotic: Compared

Gastroparesis: Delayed Gastric Emptying Explained

The Vagus Nerve and Gut-Brain Communication

Psychobiotics: Probiotics for Mental Health

Gut Recovery After Antibiotics: A Protocol

The Gut-Sleep Connection

Gut Health Starter Guide for Beginners

Gut Hormones, the Estrobolome and PCOS

Gut Microbiome Diversity: Why It Matters

What Is the Gut Microbiome?

The Gut Microbiome and Mental Health

Microbiome Testing: 16S rRNA and Viome Explained

Viome vs Thryve vs Biomesight: Compared

Gut Microbiome and Weight Loss

Gut Motility and Constipation

Akkermansia Muciniphila and the Gut Barrier

Butyrate, Colonocytes and the Role of Resistant Starch

Primary vs Secondary Bile Acids: A Deep Dive

Celiac Disease, Villi Damage and Gut Healing

Eosinophilic Esophagitis (EoE) and Elimination Diet

Exocrine Pancreatic Insufficiency and Enzyme Replacement

Vagus Nerve, Serotonin and Microbiome Mood Effects

Crohn's Biologic Therapy: TNF, Vedolizumab and More

The Gut-Brain Connection: Your Second Brain

Gut Microbiome and Mental Health: The Connection

Candida Overgrowth in the Gut: Full Guide

Constipation and Gut Health

Constipation: Magnesium, Fiber and Motility Protocols

Microbiome Changes That Support Weight Loss

Gut-Brain Axis, Microbiome and Mood Regulation

How the Gut Makes Serotonin

Alpha vs Beta Diversity: Reading Your Microbiome Report

Explore by topic

What are you trying to understand?

Bacteria, fungi, diversity

Strains, brands, conditions

Permeability, zonulin, healing

Crohn's, colitis, SIBO

Fiber, fermented foods, elimination

At-home kits, interpretation, labs

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