Healthy Eating & Eating Disorders - Anorexia, Bulimia, Binging | Huberman Lab Podcast #36

Signals

Understanding hunger and satiety involves both mechanical and chemical signals within the body. Andrew Huberman explains that when the stomach is full, it sends mechanical signals to the brain indicating fullness, while chemical signals from nutrients also play a role 1. These signals help regulate our motivation to eat or refrain from eating.

When your stomach is full, it sends signals to your brain that are purely based on this mechanical fullness, has nothing to do with nutrients, that says I'm full. And therefore don't be as hungry.

--- Andrew Huberman

Additionally, body fat and hormones like leptin signal the brain about energy reserves, influencing hunger and reproductive functions 2.

   

Neural Pathways

Neural pathways play a crucial role in regulating hunger and satiety. Andrew Huberman highlights the arcuate nucleus in the hypothalamus, which houses neurons that drive hunger and satiety based on food availability and social context 3. These neurons respond to visual, olfactory, and social cues, influencing our eating behavior.

Every animal, including humans, has a hardwired circuit that we were born with that pays attention to how much food is available, how much we are getting now and how much we are likely to get in the future.

--- Andrew Huberman

Evolutionarily, humans are wired to eat as much and as often as possible due to the historical scarcity of food, a behavior that persists even when energy reserves are sufficient 4.