20 citations
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February 1977 in “The anatomical record” Excess vitamin A changes skin and hair follicle development and affects polysaccharide distribution.
28 citations
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January 2013 in “Stem cells” Certain human skin cells marked by CD44 and ALDH are rich in stem cells capable of long-term skin renewal.
521 citations
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January 1954 in “Physiological Reviews” Hair growth is cyclic and influenced mainly by local factors.
85 citations
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July 2012 in “Cold Spring Harbor perspectives in biology” The skin protects the body and is constantly renewed by stem cells; disruptions can lead to cancer.
12 citations
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February 1997 in “British Journal of Dermatology” The enzyme type 1 5α-reductase is more active in the hair follicle's lower part than in the skin's outer layer.