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Henna contain lawsone pigment that attaches to the proteins of the skin,hair,etc.But after a few weeks the color fades?

How does the color fade?

Is the pigment volatile or it is degraded by the body?

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It doesn't become volatile nor is it degraded. Neither is really possible because the dye (lawsone) forms very strong bonds with protein molecules and also penetrates the skin quite well [source: here].

Henna fades with time via exfoliation. In other words, it fades progressively as additional layers of skin die and fall (or "slough") off.

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  • $\begingroup$ Is the same for hair and nails $\endgroup$
    – Mesentery
    Commented Feb 25, 2017 at 20:21
  • $\begingroup$ almost certainly.... $\endgroup$ Commented Feb 25, 2017 at 20:25

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