Gut health became wellness culture’s obsession: probiotics, fermented foods, microbiome testing, elimination diets. The “gut-brain axis” linked digestive health to mental health, immune function, and overall wellness. Market exploded with supplements, tests, and influencer protocols.
Core Concepts
- Microbiome - Trillions of gut bacteria influence health
- Gut-brain axis - Gut bacteria produce neurotransmitters (serotonin, dopamine)
- Leaky gut - Controversial theory linking intestinal permeability to disease
- Dysbiosis - Bacterial imbalance causing symptoms
Popular Interventions
- Probiotics - Lactobacillus, Bifidobacterium supplements
- Fermented foods - Kimchi, sauerkraut, kefir, kombucha
- Prebiotics - Fiber feeding beneficial bacteria
- Microbiome testing - Viome, Thorne, Ombre kits
Influencers & Books
- Dr. Will Bulsiewicz - “Fiber Fueled” (2020)
- Glucose Goddess - Jessie Inchauspé’s hacks went viral
- Dr. Steven Gundry - “The Plant Paradox” (lectins controversy)
Controversy
- Testing accuracy - Microbiome tests’ clinical utility questioned
- Probiotic efficacy - Strain-specific, not one-size-fits-all
- Overhype - “Gut health” blamed for everything
Sources: Gut microbiome research publications, probiotic market data