“Stanley did a study that measured opioid levels in cerebral spinal fluid (opioids are our natural endorphins), and found that in self-injurers, the levels were reduced. So she wonders whether people who prone to self-injury “might have a deficit in endogenous opioids,” and hurt themselves as a way to self-medicate, or boost levels of these “feel good” chemicals.” – Alice G. Walton

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