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Two teal Malibu C swimmers hair remedy packets standing on a white marble counter with soft grey veining in front of a softly blurred warm beige wall, with a bright window at right
damaged hair

What Is Hair Porosity? What Lab Studies Measured

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Porosity is how readily hair takes in and holds water. See what lab studies found about bleach, sunlight, and pool water, and what the float test can show.

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