How many categories of skin types did Dr. Fitzpatrick define?

Dr. Fitzpatrick defined six categories of skin types, which are primarily used to assess a person's skin response to ultraviolet (UV) light and to guide safe tanning practices. These types, known as the Fitzpatrick Skin Types, range from Type I (very fair skin that burns easily) to Type VI (deeply pigmented skin that rarely burns). Understanding these categories helps professionals evaluate the risk of sunburn and make informed recommendations regarding tanning and skin care.

The classification system is essential in both dermatology and the tanning industry because it allows for personalized approaches to UV exposure, ensuring clients receive individualized advice based on their skin's sensitivity and potential reactions to sunlight.