In animal tests, this needle-free insulin acted as fast as injections

The technique, which ferries insulin through the skin, might also work for other drugs

A row of 21 hypodermic needles of varying lengths are lined up, needles pointing up, against a blue background.

Tests in mice and mini pigs of an insulin modified to permeate through the skin raises hopes that injections could someday be a thing of the past.

MirageC/Getty Images

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