72 citations,
February 2011 in “American Journal of Biological Anthropology” The conclusion is that recognizing hair growth cycles can improve the precision of dietary and health assessments from hair analysis.
71 citations,
May 2007 in “The FASEB journal” Human hair follicles produce and respond to erythropoietin, helping protect against stress.
68 citations,
March 1965 in “The BMJ” Hormones and genetics affect hair growth and patterns, with some changes reversible and others not.
63 citations,
October 1972 in “British Journal of Dermatology” Women with thinning hair have thinner hair strands than women without hair loss.
58 citations,
February 2016 in “Scientific reports” Blocking BACE1 and BACE2 enzymes causes hair color loss in mice.
56 citations,
September 2013 in “Journal of Biochemistry and Molecular Biology” Androgens increase a growth factor in hair cells by creating reactive oxygen species, and antioxidants might help treat hair loss.
51 citations,
September 2020 in “Cell Metabolism” Glutamine metabolism affects hair stem cell maintenance and their ability to change back to stem cells.
50 citations,
September 2016 in “The Journal of Clinical Endocrinology and Metabolism” Finasteride for hair loss may cause persistent sexual symptoms, depression, anxiety, and lower quality of life.
48 citations,
May 2015 in “NPJ microgravity” A 3-month stay in space causes skin thinning, disrupts hair growth, and changes muscle-related genes in mice.
45 citations,
June 2004 in “Lasers in Medical Science” Intense pulsed light (IPL) is an efficient and safe method for hair removal, reducing hair by about 80%.
43 citations,
October 2002 in “International Journal of Cosmetic Science” All three shampoos reduced dandruff and hair loss, but ketoconazole and piroctone olamine also made hair thicker.
43 citations,
September 2001 in “Scanning” Hair treatments like bleaching increase friction by exposing tiny pores on the hair surface.
42 citations,
January 2017 in “Stem cells international” Adding hyaluronic acid helps create larger artificial hair follicles in the lab.
42 citations,
January 2009 in “Colloids and Surfaces B: Biointerfaces” A certain surfactant sticks to human hair, making it change from water-repelling to water-attracting, which could help in hair conditioning.
41 citations,
December 2008 in “International Journal of Dermatology” South Korean women with hair loss have lower hair density and thickness compared to healthy women.
40 citations,
May 2016 in “Proceedings of the National Academy of Sciences of the United States of America” Changes in keratin make hair follicles stiffer.
40 citations,
January 2013 in “Journal of Korean Medical Science” Iron deficiency may contribute to hair loss.
39 citations,
August 2018 in “Scientific reports” Claudin-1 is important for the barrier function and growth of hair.
38 citations,
October 2011 in “Analytical biochemistry” Hair proteins have weak spots in their α-helical segments.
38 citations,
June 2003 in “Journal of Investigative Dermatology Symposium Proceedings” Accurate clinical, histological, and genetic methods are key for understanding and treating hair disorders.
37 citations,
March 2014 in “Journal of Trace Elements in Medicine and Biology” Lower hair zinc and copper levels found in Turkish males with hair loss; higher BMI linked to less hair zinc.
36 citations,
February 2017 in “BMC Complementary and Alternative Medicine” Geranium sibiricum extract helps hair grow and is more effective than minoxidil but can be toxic in high concentrations.
36 citations,
October 2014 in “Langmuir” Bleaching hair removes its protective top layer and exposes more hydrophilic groups, changing its chemical surface and affecting how it interacts with products.
32 citations,
April 2016 in “Journal of Investigative Dermatology” STAT5 activation is crucial for starting the hair growth phase.
31 citations,
September 1999 in “Dermatologic Surgery” Cooling hair micrografts during transplantation does not improve their survival or growth.
28 citations,
September 2019 in “International Journal of Nanomedicine” Minoxidil nanoparticles can potentially be a more effective treatment for hair growth than current treatments.
28 citations,
December 2011 in “Biocatalysis and biotransformation” PDI helps restore over-bleached hair's strength and structure by attaching special peptides.
28 citations,
December 2010 in “Langmuir” Hair fibers interact through classical forces, which are influenced by treatments and products, important for hair care and other applications.
27 citations,
January 2010 in “Animal” South American camelids should be sheared early, fleece type affects fiber quality, and the S/P follicle ratio doesn't distinguish between Bolivian llama genotypes.
26 citations,
August 2019 in “Stem Cell Research & Therapy” PBX1 helps hair stem cells grow and change by turning on certain cell signals and preventing cell death, which may be useful for hair regrowth treatments.