Do you have any data on the shedding rate of facial hair in a normal adult male? With citation if available. Thanks in anticipation
I can not find any source explaining the rate of cycling in facial hair. Hair shedding usually happens after the growth phase (anagen) stops and hair goes to the resting phase (telogen). The longer the growth cycle, the shorter is the resting (telogen) phase, and the the longer is the final length of hair. Scalp hair can grow to become very long because its long growth phase (2 – 6 years) and its relative short resting phase (2 – 6 months) when compared to the growth phase. In contrast, eyebrow or body hair with shorter growth, as a disproportional longer resting phase can never grow to become long. Facial hair in men should follow a similar pattern to the scalp hair (short shedding phase and long growth phase). About 10% of the total number of beard hairs present on the face would be my guess for the resting phase, so count your beard hair numbers to make the estimate work for you.