In the hair growth cycle, which body part is known to remain in the telogen phase the longest?

The back is known to remain in the telogen phase of the hair growth cycle longer than other body parts. The telogen phase is the resting phase, where hair follicles are not actively producing hair. This duration can vary across different parts of the body due to varying levels of hormonal influence, blood supply, and other biological factors.

The back tends to have hair follicles that operate in a longer telogen phase compared to areas like the scalp, legs, and arms. In contrast, the scalp experiences a more active growth cycle, which means its follicles may transition more quickly between growth and rest phases. Similarly, legs and arms typically have shorter telogen times due to factors such as increased hair growth rates in response to hormonal changes, which is less pronounced in the back region. Understanding these differences in hair growth cycles across the body can be crucial for fields related to dermatology and hair removal treatments.