What Fitzpatrick types are known to have a deeper root system?

Fitzpatrick skin types IV to VI are known to have a deeper root system primarily due to the presence of higher melanin levels in the skin, which is an adaptation to protect against ultraviolet radiation. As skin pigmentation increases, the anatomical structure and depth of hair follicles can also differ, leading to a deeper root system in darker skin types.

Individuals with these skin types typically have thicker dermal layers and denser connective tissue. This structural difference can influence various treatments and procedures in medical aesthetics, such as hair removal or skin rejuvenation, since the responses of these skin types to different therapies can vary significantly. Understanding the characteristics of these skin types helps practitioners tailor their approaches for safety and effectiveness.