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Episode 328 - Desert dates in your skin serums, Chelating shampoos and more

The Beauty Brains

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How Do You Measure Permeation?

In the old days, we used to take either pig skin samples or you might get a sample of a human cadaver. You can measure it at the speed at which it goes from the surface of the skin and into the liquid below. But penetration is kind of a complicated thing. It's difficult to say exactly how much time it's going to take because there's so many factors involved.

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