Sugar flips the same reward switch in your brain as nicotine and alcohol — just with a smaller hit. In this video you learn: dopamine fires the moment sugar hits your tongue, before the food even reaches your stomach; eat sugar day after day and your brain dials down its dopamine receptors, so the same cookie gives less pleasure and you need more to feel the same; and in lab rats, sugar bingeing showed the same four signs as drug dependence — bingeing, withdrawal, craving, tolerance. Oh, and the sugar rush? A myth: a review of 31 studies found no mood boost at all.
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