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Since a tan occurs in the epidermis,
the outermost layer of the skin, it is eventually lost during
your skin's natural exfoliation process. Every 28-30 days, your
skin completely replaces all of its cells, and the cells at
the top layer are eventually sloughed off, allowing the new
cells to reach the skin's surface. When the old cells are exfoliated,
they take with them the darkened melanin that was created by
the exposure to UV light. In order to maintain your tan, you
must continue to expose your skin to UV light. |
