Gut Health
Strong evidence for fibre. Much weaker evidence for everything being sold.
Gut health is where genuinely good nutrition science meets one of the most aggressive supplement markets going. The gap between the two is wide: fibre has some of the strongest observational and trial evidence in nutrition, while the tests and powders sold in its name mostly don't stand up.
These guides keep the two apart, and flag the symptoms that should go to a GP rather than into a protocol.
Guides
- Fibre and the Microbiome: What's Actually Established
The best-evidenced piece of nutrition advice almost nobody follows, and what the microbiome science does and doesn't yet support.
- Microbiome Tests: Why Experts Say Not Yet
Send one sample to six companies and you get six different answers. That's the finding, and it's the whole story.
- Bloating and IBS: The Evidence-Based Route
What is worth trying, what needs a dietitian rather than an app, and the symptoms that mean stop self-managing.