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Natural painkiller found in human spit

Compound in saliva could be more powerful than morphine.

Doctors may have a new natural weapon to fight pain. Credit: Punchstock


  1. Rougeot C., et al. PNAS, 100. 8549 - 8554 (2006).

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  2. Wisner A., et al. PNAS, doi:10.1073/pnas.0605865103 (2006).

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Smith, K. Natural painkiller found in human spit. Nature (2006).

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