What is a Tan?

A tan is the creation of particles of melanin by special cells in the body.  These are like little sun shades the cells use to block the sun and stop its rays from burning the cells hiding under them.  If the skin already has some melanin in it, then the cell will work to increase the number of them and increase the shade they provide.  

For a more scientific understanding of melanin please go to the science section of the website where we have several papers on the subject from leading experts in the field.