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Scientists identify biological signals by what we believe them to mean psychologically. So, 'serotonin is a happiness chemical.' No, serotonin evolved as a metabolic regulator. It is a metabolic
regulator.
Lisa Feldman Barrett
Serotonin Isn't a Happiness Chemical & Cortisol Isn't a Stress Hormone
Dr. Lisa Feldman Barrett: How to Understand Emotions
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