Ultraviolet (UV) sunlight causes excessive melanin production, when the melanocytes
are stimulated and melanin is deposited to protect the skin from overexposure. The
visible result of this process is further darkening of areas that are already hyperpigmented,
and darkening of new areas that were previously undamaged. Therefore, use of sun
protection factor (SPF) products is a must for every skincare client. SPF products
allow the skin to absorb the harmful energy of the sun’s rays to prevent hyperpigmentation.
The sun screen must be “broad spectrum,” meaning that it blocks both ultraviolet
A and B rays.