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Definition one of many neurochemicals in the brain (naturally occurring opiates) that produce pain relief and a sense of well-being
  • Placebos can have the physical effect of increased production of endorphins.
  • Exercise produced endorphins, and endorphins made me feel good.
    Scott Pratt  --  An Innocent Client
  • The older the vampyre, the more endorphins are released during blood drinking, and the more intense the experience of pleasure for vampyre and human.
    P.C. Cast & Kristin Cast  --  Betrayed
  • She exercised so often that the endorphins her body produced functioned as a drug that made it difficult for her to stop training.
    Stieg Larsson  --  The Girl Who Kicked the Hornet's Nest
  • Because of the endorphins and stuff.
    Lauren Oliver  --  Delirium
  • But my endorphins were surging and that, combined with the huge sense of relief, left me totally giddy.
    Gayle Forman  --  If I Stay
  • The parasite did its best to block the pain; Theta was unconscious much of the time and his body was producing incredible quantities of endorphins.
    Dan Simmons  --  Hyperion
  • Endorphins kick in-the body's natural morphine-and carry you somewhere far away, where the pain can't find you.
    Jodi Picoult  --  Nineteen Minutes
  • Endorphins release.
    Rick Yancey  --  The Infinite Sea
  • Her mind was replaying the conversation while her retina scanner informed her that her body was producing mass amounts of endorphins and she should try to calm down.
    Marissa Meyer  --  Cinder
  • The endorphins start to flow, and the adrenaline, and you hold your breath and creep quietly through the moonlit nightscapes; you become intimate with danger; you're in touch with the far side of yourself, as though it's another hemisphere, and you want to string it out and go wherever the trip takes you and be host to all the possibilities inside yourself.
    Tim O'Brien  --  The Things They Carried
  • Being happy and feeling helpful and all like that might bring up my immune system and my endorphins and all that self-healing stuff.
    Beatrice Sparks  --  It Happened to Nancy
  • Exercise produced endorphins, and endorphins made me feel good.
    Scott Pratt  --  An Innocent Client
  • Vampyre saliva also secretes endorphins during blood drinking, which stimulate the pleasure zones of the brain, human and vampyre, and can actually simulate orgasm.
    P.C. Cast & Kristin Cast  --  Betrayed

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