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Published: Dec 15, 2025 01:27 pm IST
Sugar gives a quick dopamine rush, but the long-term effects can be serious. Neurosurgeon Dr. Prashant Katakol explains how it affects the body.
Sugar is a key ingredient in most diets, hiding in everything from sweets and beverages to sauces and snacks. While it may satisfy your sweet cravings, consuming it in excess can not only affect your waistline, but it can also affect your energy, mood, and even your nervous system.
Dr. Prashant Katakol, a neurosurgeon with over 33 years of experience in neuroscience, explained what exactly happens to your body when you eat too much sugar in his December 14 Instagram post. (Also read: Doctor explains how changing this ‘1 habit’ in the morning boosted his energy throughout the day,
How does sugar affect your brain and nervous system?
Dr. Prashant explains how excess sugar affects the nervous system, brain, and fat storage in a clear, visual way.
The video begins with sugar molecules “arriving” inside the body and interacting with the brain, triggering the release of dopamine, the chemical responsible for temporary feelings of pleasure and happiness. Although this provides a short-term boost, the animation shows that the effects are fleeting and come at a cost.
What happens to excess sugar in your body?
As more sugar enters, the pancreas is told to release insulin. In some cases, resistance develops, causing the sugar to accumulate in the liver and eventually be stored as belly fat. “Welcome to belly fat, my friend. Nobody wants us here, and yet nobody takes us out,” the animation explains how excess sugar accumulates when the body can’t process it efficiently.
Dr. Prashant’s video effectively explains the chain reaction triggered by sugar from the brain’s reward system to insulin response and fat storage, making it clear that while sugar provides a quick energy boost, over-consumption can have lasting effects on overall health.
Note to readers: This report is based on user-generated content from social media. HT.com has not independently verified the claims and does not endorse them.
This article is for informational purposes only and is not a substitute for professional medical advice.
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