Opiorphin

Rarity: Common

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Notion

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Science and technology

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What Wikipedia says

Opiorphin is an endogenous chemical compound first isolated from human saliva. Initial research with mice shows the compound has a painkilling effect greater than that of morphine. It works by stopping the normal breakup of enkephalins, natural pain-killing opioids in the spinal cord.

Excerpt from the Wikipedia article “Opiorphin”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Edgar181 (talk), Public domain, via Wikimedia Commons.