Why and how to tans go away?
In: Biology
You get a tan when the sun damages your skin and that damage stimulates cells called melanocytes to make melanin which makes your skin darker and therefore less likely to get damage from the sun. Once you are no longer in the sun and having your melanocytes stimulated they stop making melanin and your tan fades away. Pretty much your body stops producing melanin because its wasteful and you only need it part time.
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