Animals lick their wounds. Why? No one is sure.
People have been told for years not to lick wounds because the mouth is filled with bacteria, so the experts told us that licking a wound would be the worst possible thing we could do.
Now researchers have discovered a compound in saliva that speeds up healing. The compound is called histatin, and it was formerly thought only to kill fungi.
Rodent saliva also contains various growth factors that are thought to accelerate healing, but the...

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