Understand your gut-brain axis
Six short, honest self-assessments — 60 seconds each. Each one scores a different part of the gut-brain axis, gives you a profile in plain language, and points you at the science behind it. No sign-up required, and none of them are diagnostic.
All quizzes
6 assessments · always free
🧠 Your gut-brain profile
A 60-second self-reflection on the everyday habits linked to gut and brain wellness. It does not measure your microbiome, detect disease, or...
🌊 Stress & recovery
Stress does not stay in your head — the HPA axis and vagus nerve carry it straight to the gut, and the gut answers back. This looks at how hard...
🌱 Plant diversity
The single strongest dietary correlate of a diverse gut microbiome in the large population studies isn't any one superfood — it's the number of...
🌙 Sleep & your gut clock
Your gut microbes keep time too — their composition and activity swing on a daily rhythm that tracks your light, your meals and your sleep. This...
🫙 Fermented foods check
A Stanford trial found a high-fermented-food diet lowered inflammatory markers and raised microbiome diversity where a high-fiber diet alone...
🌫️ Brain fog patterns
Brain fog isn't a diagnosis — it's a description, and it has a long list of possible causes. This sorts your version by pattern, so you know which...
Straight answer: nothing sneaky.
Your responses are stored anonymously so we can see which patterns bring people here — that's it. You only give an email if you want the result sent to you, and you can take every quiz here without one. No result is a diagnosis, none of them measure your microbiome, and any quiz that surfaces something clinical will tell you to go and see a real clinician.
Then do something with the result
🧪 Run an n-of-1 experiment
Take one starter move from your result and track it against your own mood, gut comfort and sleep for a few weeks. Free, private, exportable.
📚 Read the science
Every claim behind these quizzes is written up in the science library, fully cited, in plain language.
🔬 Follow new research
A daily feed of new gut-brain primary literature, scored and summarised as it publishes.