You've got five senses. Everyone taught you that in school.
Sight. Sound. Smell. Taste. Touch.
Turns out there's a sixth.
And scientists say it might matter more than all the others combined.
It's called interoception.
Not psychic powers. Not gut feelings in the mystical sense.
It's your brain quietly reading your body's internal dashboard — heart rate, hunger, temperature, that "something's off" feeling before you even know why.
Yes. And you use it constantly.
That's interoception firing in the background. Silent. Unnamed. Ignored.
Until now.
Scientists Jennifer Murphy and Freya Prentice put it plainly.
It ensures every system in the body works optimally.
But when this inner radar glitches, the fallout isn't just physical.
👉 It shows up as anxiety.
👉 It shows up as depression.
👉 It shows up as eating disorders and PTSD.
UCLA researchers used a vibrating pill to test gut sensations in people with anorexia nervosa.
The finding was unsettling.
Even after patients regained weight, their brains still couldn't reliably sense hunger.
Neuroscientist Sahib Khalsa said it best: "Their nervous system may process gut sensations differently, making those signals harder to detect, trust and learn from."
Translation: it's not willpower. It's wiring.
A 2022 review of 93 studies found something striking.
Women showed lower accuracy on heart-based interoception tasks than men.
Could this help explain why anxiety and depression spike in women after puberty?
Scientists say: maybe. There's still a lot to untangle.
Not every researcher is convinced.
A 2024 paper went as far as titling itself "There is no such thing as interoception."
Their point? The word might be too neat for something far messier underneath.
Whatever you call it — this hidden sense already runs your mood, your fear, your appetite.
Understanding it better could reshape how we treat anxiety, depression, and eating disorders.
The five senses taught you about the world outside.
The sixth one has been trying to tell you about the world inside.
Turns out, we just weren't listening.
That's all for now!
