131 citations
,
July 2009 in “Experimental Dermatology” The document concludes that specific cells are essential for hair growth and more research is needed to understand how to maintain their hair-inducing properties.
128 citations
,
March 2006 in “American Journal of Pathology” Prolactin contributes to hair loss by promoting hair follicle shrinkage and cell death.
127 citations
,
December 2005 in “Experimental Dermatology” Stress can stop hair growth in mice, and treatments can reverse this effect.
124 citations
,
August 1994 in “Journal of Investigative Dermatology” Dexamethasone speeds up hair loss in mice, while cyclosporin A slows it down.
116 citations
,
May 2013 in “Proceedings of the National Academy of Sciences of the United States of America” Hair grows faster in the morning and is more vulnerable to damage from radiation due to the internal clock in hair follicle cells.
102 citations
,
February 2008 in “The FASEB Journal” One minoxidil-sensitive potassium channel exists in human hair follicles.
95 citations
,
July 2010 in “Genes & development” Notch/CSL signaling controls hair follicle differentiation through Wnt5a and FoxN1.
92 citations
,
June 2005 in “Journal of Investigative Dermatology” All-trans retinoic acid causes hair loss by increasing TGF-β2 in hair follicle cells.
91 citations
,
April 2011 in “Journal of Ethnopharmacology” Polygonum multiflorum extract helps grow hair by activating certain hair growth signals in mice.
91 citations
,
January 2009 in “International Journal of Trichology” Different hair evaluation methods have their own pros and cons, and using multiple methods together is best for accurate hair loss diagnosis and tracking.