LEVELS – A Whole New Level #308 - Why Some Foods Are So Hard to Stop Eating | Dr. Dana Small & Mike Haney
Aug 27, 2026
Dr. Dana Small, a neurologist and psychologist who studies how the brain and body learn about food, explains why some foods trigger persistent cravings. She talks about how taste vs flavor differ, how post-ingestive nutrient signals teach the brain, why fat+carb combos hit especially hard, and how treatments like GLP-1s and behavioral relearning can alter wanting without killing pleasure.
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Taste Is Nutrient Signal While Flavor Names Foods
- Taste is a small set of nutrient/toxin signals (sweet, salty, bitter, umami) while flavor is mainly retronasal smell that identifies the food.
- Holding your nose removes strawberry-ness but leaves sweetness, proving flavor is olfaction relocalized to the mouth.
Strawberry Example Shows How Preference Is Learned
- Dana uses strawberries to illustrate how sight, taste, and flavor build a learned preference when post-oral glucose signals follow ingestion.
- First exposure registers sweet; repeated post-ingestive reward makes the flavor itself become liked and predictive of energy.
Texture And Culture Can Override Nutrient Signals
- Texture and cultural exposure shape food acceptance: flavor learning can make novel foods liked, but unpleasant texture or social context can block acceptance.
- Dana links picky eating to texture cues that generalize to avoidances (e.g., gritty seeds resembling bones), explaining individual dislikes.
