Fraction of hair in a normal healthy scalp that are in anagen, catagen and telogen stages of hair growth

Range anagen 80% - 85%: catagen 1% - 2% telogen 10% - 20% %
Organism Human Homo sapiens
Reference Robbins, Clarence R. Morphological and macromolecular structure, pp.1-38, chapter 1 in the book Chemical and physical behavior of human hair / Clarence R. Robbins.-2nd ed (2002) p.6 bottom paragraph
Primary Source [7] Pinkus H. (1981) Alterations of the Hair Follicle in Hair Diseases. In: Orfanos C.E., Montagna W., Stüttgen G. (eds) Hair Research. Springer, Berlin, Heidelberg pp 237-243, link
Comments P.6 bottom paragraph: "In male pattern baldness, there is a progressive miniaturization of hair follicles. The result is a transition of terminal hairs to vellus hairs [ref 6] as opposed to the common misconception portrayed by the term "hair loss." In a normal healthy scalp, approximately 80% to 85% of the hairs are in anagen, 1% to 2% in catagen, and 10% to 20% in telogen [primary source]. In male baldness, the anagen stage is shortened in time, and there is a greater percentage of hairs in the telogen stage [ref 8]." Please see 'Comments' section in BNID 114256 for definition of the different stages of hair growth
Entered by Uri M
ID 116430