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Why does the laser not work well on blond, gray, or red hair?

April 26, 2017blond Gray hair laser red

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Why does the laser not work well on blond, gray, or red hair?

1 Answer

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The laser energy interacts with pigment or “melanin” in the hair root. Blond, gray, or red hair colors either do not have much/any melanin in them, or are of the type (pheomelanin) that do not absorb light as well as the other form of melanin (eumelanin).