The honest science of your gut microbiome

Your probiotic isn't broken.
It's incomplete.

You were sold live bacteria — but never the food to feed them, or the finished compounds they're meant to make. Meet your microbiome as it actually is: an ecosystem, not a pill.

No hype · No fake experts · Evidence, rated
The whole story

Gut health was only ever three parts.

Most "gut health" products gave you the first one and quietly skipped the other two. Here's the whole picture — in plain language.

1
The bacteria

Probiotics

The live bacteria themselves. Useful — but they need two things most bottles leave out.

2
Their food

Prebiotics

The fibre that feeds them. Send bacteria in with nothing to eat, and not much happens.

3
The finished compounds

Postbiotics

The finished compounds your bacteria make from fibre — like butyrate, the fuel your gut lining runs on. The catch: that only happens with the right bacteria and enough fibre to feed them, which many people don't have — so it's a compound the body often makes too little of.

Your gut isn't a pill problem. It's an ecosystem — and you were only ever feeding a third of it.

More than digestion

Your gut has been linked to more than digestion — immunity, mood, metabolism, even how we age. Most of that is still early science, so we'll explore it with you honestly, one evidence tier at a time.

Why us

We rate our own evidence. Nobody else will show you this.

Most brands blur lab studies, mouse data, and human trials into one confident-sounding claim. We tag every claim with how strong the science actually is — on every post, and throughout the free guide.

Showing the tier is the whole point. It's what lets you tell a real finding from a marketing line.

Strong human evidence
Multiple good-quality human trials. Reasonably reliable.
Moderate human evidence
Human trials exist, but limited. Real — hold it loosely.
Emerging human evidence
Early human trials, preliminary. Promising, not settled.
Mechanistic / preclinical
Lab and animal studies. Not proof it works in people.
Associative only
A correlation in people. Can't prove cause.
Where we stand

Against the theatre. For the honest version.

We're against gut-health theatre

  • The CFU number-wars — "50 billion!" as if bigger means better
  • Symptom-fear ads designed to make you feel broken
  • Fake doctors and borrowed authority
  • Confident overclaiming that outruns the evidence

We're for teaching you the truth

  • Wonder about the world inside you, not fear about symptoms
  • Teaching first — the science earns the sale, not the other way round
  • Rating the evidence honestly, including when it's thin
  • Real science in plain words — never dumbed down, never jargon-walled
TENDRIL
The Gut-Health Honesty Guide
No hype · Evidence, rated
Free guide

The Gut-Health Honesty Guide

The five myths the label hopes you don't know, the evidence scale, and what actually helps your gut — in ten honest minutes.

  • The evidence scale, explained
  • The "50 billion CFU" myth
  • The 70% immune myth
  • The serotonin myth
  • "Linked to" vs "causes"
  • What actually helps (free)
No spam, no fear-mongering. Unsubscribe anytime. Just the honest version.
What's next

A supplement, described as honestly as everything else.

ProbioticsPrebioticsPostbiotics

We're building a synbiotic + postbiotic — the bacteria, their food, and the finished compounds, in one honest formula. No CFU theatre, no overclaiming, every ingredient explained. Get the guide and you'll be first to know when it's ready.