What is a follicular unit? How does we use the variations on follicular units to our advantage during a hair transplant?

New York City

By Dr. Benjamin Paul

The follicular unit is the fundamental unit from which hair grows. The unit contains a hair shaft, a muscle (the arrector pili – the muscle that makes hair “stand on edge”) and a sebaceous gland.  The unit contains 1, 2, 3 or 4 hairs.  The single hairs are very valuable to line the hair line. The 2, 3 and 4 haired follicular units are used for density. Rarely, a 5 haired unit may be present and is very valuable. On average, most adults have 2 or 3 hairs per follicle (average 2.3). The distribution, density, and angulation of the shaft of the follicular unit are all artfully placed to create beautiful and natural hair transplant results.

Hair follicular culture close up

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