Question: how long does it take for your brain to know your stomach is full?
Answer: The short answer: yes, it can take up to 20 minutes to feel full once we start to eat. "Generally there is a delay -- a disconnect between when you put food in (and your brain goes 'this is nice') to when it gets to your gut (and your gut goes 'hang on, brain, you better slow that down, mate')," Andrews said.