Why Artificial Sweeteners Confuse Insulin and Memory
Dr. Scott Kanoski explains how artificial sweeteners alter insulin responses, tongue receptors, and memory function in rodent trials.
How Food Choices Shape Memory, Cognition & Cravings | Dr. Scott Kanoski
With Andrew Huberman, Scott Kanoski · Sunday, October 18, 2026
Dr. Scott Kanoski joins Andrew Huberman to discuss how dietary choices, gut signaling, and metabolic hormones shape memory and appetite. They explore the neurological mechanisms of GLP-1 drugs, the developmental risks of high-sugar and ultra-processed diets on hippocampal function, and the gut-brain vagal pathways that translate feeding into neural plasticity.
Key takeaways
- Tasting sweet flavors triggers an early cephalic phase insulin release before calories ever reach the gastrointestinal tract. Read more →
- Native GLP-1 works through two separate systems: peripheral release from intestinal L cells during digestion and central release from brainstem neurons. Read more →
- Sugar intake doubles Parabacteroides in rodent guts, and transferring these microbes into unexposed subjects creates memory deficits on its own. Read more →
- Nutrient intake triggers a tripartite neural circuit traveling from sensory vagal fibers in the gut to the brainstem, through the medial septum, and into the hippocampus. Read more →
- Sugar intake matching the concentration of a standard soft drink causes long-term hippocampal memory deficits in animal models, even when rodents have access to healthy food. Read more →
5 articles from this episode
Wegovy, the Vagus Nerve, and How GLP-1 Stops Hunger
Dr. Scott Kanoski explains how GLP-1 curbs appetite through the vagus nerve and why newer drugs crossing the blood-brain barrier remains debated.
Sugar and High Heat Alter Gut Bacteria That Control Memory
Dr. Scott Kanoski shows how sugar and high heat alter gut microbes to harm memory, and why commercial gut tests cannot fix it.
How Mealtime Gut Vagus Signaling Drives Hippocampal Memory
Scott Kanoski shows how gut vagus signaling and chewing spike hippocampal acetylcholine to encode memory, and how vagal stimulation rescues deficits.
Why a High-Sugar Diet Damages Hippocampal Memory in One Week
Dr. Scott Kanoski explains how high-sugar Western diets impair hippocampal memory in days, and why exercise is required to reverse the damage.
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