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But they were cured—the stress symptoms reversed—when researchers brought in what they called a ‘monkey hug therapist,’ an older monkey who constantly hugged and cuddled the stressed-out baby monkeys. So what was going on? The hugging broke the feedback loop, sending the message ‘No more steroids needed,’ damage over and done with! The chronically elevated CRF levels came down.

Molecules of Emotion: The Science Behind Mind-Body Medicine