L cells live farther down your gut. When food reaches them, they send out two helpers: GLP-1 and GLP-2.
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L cells are found mostly in the last part of your small intestine and in your large intestine. That's a long way from your mouth!
An L cell is tall and thin. Its top touches the food passing by. Its bottom holds tiny bubbles of two hormones: GLP-1 and GLP-2.
Scroll up to the 3D model and press Send GLP to watch the hormones go into the blood.
So L cells help with blood sugar, with knowing when you've had enough, and with looking after the gut itself.
Some medicines for diabetes work by copying the GLP-1 messenger that L cells make.