About This Project
Science Illuminates
Your Story
What shapes your personality goes beyond psychology.
Sensory sensitivity, autonomic rhythms, gut environment, metabolic speed --
inside your body lives another "you" that hasn't been put into words yet.
Philosophy
Why Read Personality from the Body?
Personality isn't built by the brain alone
Most personality tests rely on psychological self-reports like "Are you introverted?" But recent neuroscience shows that the foundation of personality lies deeper -- in ion channel sensitivity, vagal tone, and gut microbiome composition.
90gut draws inspiration from these findings. When you answer questions, you're unconsciously verbalizing your physiological tendencies. We visualize those as 6 axes and weave them into a story of 16 archetypes.
The truth behind "That's so accurate"
The "that's so accurate" feeling from a good personality test isn't about hit rates. It's the discovery of "I can see contours of myself I didn't even know existed."
We don't stop at labeling results. We trace back to the physiological mechanisms -- why you feel that way, why you act that way in that situation -- aiming for a reading experience like a user manual for yourself.
Characters as memory devices
"You have high Ion-Gate, low ANS-Baseline..." -- you'd forget that by tomorrow. But "Abyss Observer" as a character? That sticks.
The 16 archetypes are the direct output of the 6-axis algorithm. They weren't tacked on for show. Translating scientific structure into stories people can naturally share -- that's the design philosophy of this project.
Six Axes
Six Axes Flowing Within Your Body
Six physiological axes that shape your behavioral patterns. Each operates independently yet influences the others, mapping the "terrain" of who you are.
Neuronal ion channel sensitivity. How much stimulation you pick up and where you draw the line. The physiological basis of HSP tendencies.
The baseline balance between sympathetic and parasympathetic systems. Reflects the speed of your stress response and your ability to switch into relaxation.
The granularity and depth of emotional experience. The same sunset evokes completely different feelings in different people. This is the source of that difference.
The gut-brain axis -- the fact that gut bacteria produce 90% of serotonin. Digestive stability directly influences mood stability.
Energy production efficiency and consumption patterns. Whether you're an endurance type or a sprint type, this reveals the character of your behavioral energy.
Post-excitement dopamine metabolism speed. How quickly you return to calm after a high -- a physiological measure of recovery.
How It Works
The Experience Flow
Answer 24 questions (~3 min)
Just rate them intuitively on a 5-point scale. There are no right answers. Choose what you normally do. Behind the scenes, signals related to each of the 6 axes are being measured.
Discover your archetype
From your 6-axis scores, one of 16 archetypes is derived. Along with a character visual, you'll see a readable profile covering your essence, strengths, challenges, career fit, and health wisdom.
Compare with friends and map your relationships
Share your results on social media or compare with friends to see compatibility scores. See how your strengths complement each other and where friction might arise -- the story of your relationships emerges.
About the Scientific Basis
90gut draws inspiration from multiple academic fields including ion channel research, Polyvagal Theory (Porges, 2011), and gut-brain axis findings (Mayer, 2016). However, this is not a medical test -- it's a framework for deepening self-understanding.
Responses are based on subjective self-report and do not directly measure physiological indicators. Please interpret results from the perspective of "which axes best explain your experiential tendencies."
Ready to decode the universe
inside you?
Free, takes about 3 minutes.
Start the Quiz →