23 citations
,
December 1991 in “Annals of the New York Academy of Sciences” Balding scalps slow down hair growth.
21 citations
,
January 2016 in “NeuroImmunoModulation” Hair cortisol levels can indicate stress over the past three months.
11 citations
,
November 2015 in “Skin Research and Technology” Women's hair grows faster and thicker than men's, but hair growth slows for both genders with pattern hair loss.
7 citations
,
May 1979 in “Medical & biological engineering & computing” The trichometer accurately measures hair growth and is easy to use.
7 citations
,
September 2014 in “European Journal of Dermatology” Thicker hair grows faster; hair loss patients have slower growth.
1 citations
,
September 2016 in “Brain Behavior and Immunity” Hair cortisol levels can indicate stress and are affected by washing frequency, not cosmetic treatments.
1 citations
,
January 2016 in “Hair therapy & transplantation” Liposomal cepharanthine lotion speeds up hair growth in men with early balding.
May 2023 in “General and comparative endocrinology” Monkey hair cortisol levels are not affected by how fast their hair grows.
Plucked hair follicles grow faster than conventional ones, making them a potentially better option for hair transplants.
January 2025 in “Conservation Physiology” Bear hair grows 0.10 to 1.05 mm per day, varying by individual and season.
April 2024 in “Journal of wildlife diseases” Muskox hair growth rates vary widely, so a single growth rate can't be used for all populations.
Frontal hair in male pattern baldness shows reduced growth and thickness.
26 citations
,
December 1981 in “British journal of dermatology/British journal of dermatology, Supplement” Cyproterone acetate reduced hair growth in most hirsute females and made hair softer, thinner, and lighter.
4 citations
,
October 2009 in “Skin research and technology” Colorimetry can accurately measure hair growth rates in mice.
5 citations
,
September 2023 in “Pediatric Research”
4 citations
,
January 2022 in “Journal of nanomaterials” Silver nanoparticles made from Ziziphus nummularia fruit extract promote hair growth and fight bacteria and fungi.
August 2024 in “Siberian Journal of Life Sciences and Agriculture” Melatonin and lyotritone improve hair growth and quality in white rats.
29 citations
,
May 1975 in “Clinical Endocrinology” Combination therapy significantly reduces testosterone and moderately reduces hair growth in women with hirsutism.
January 2024 in “ResearchWorks at the University of Washington (University of Washington)” LA-ICP-MS effectively measures zinc, lead, and mercury in hair.
1 citations
,
January 2015 in “Trace Elements in Medicine (Moscow)” A 3.75-year-old girl showed that different body organs can grow at different rates.
2 citations
,
May 1981 in “Journal of Animal Science” Hair mineral analysis is not very useful for assessing overall mineral composition in animals.
January 2026 in “Journal of Nanomaterials”
70 citations
,
June 2003 in “Journal of Investigative Dermatology Symposium Proceedings” TrichoScan is a reliable method for measuring hair growth and is useful for assessing hair loss treatments.
57 citations
,
November 1987 in “Pediatric Dermatology” Children's hair grows in different types from before birth through puberty, with growth rates and characteristics varying by age, sex, and race.
31 citations
,
August 2001 in “PubMed” TrichoScan accurately measures hair growth and showed improved hair counts and thickness after finasteride treatment.
28 citations
,
March 2019 in “Journal of Dermatological Science” The document concludes that while lab results for hair growth promotion are promising, human trials are needed and better testing methods should be developed.
11 citations
,
January 2017 in “Evidence-based Complementary and Alternative Medicine” DA-5512 effectively improves hair growth and health, performing better than minoxidil.
3 citations
,
January 1994 in “Journal of Society of Cosmetic Chemists of Japan” Hair grows slower and thinner with age, but a test tonic improved growth in alopecia subjects.
2 citations
,
January 1994 in “Journal of S C C J” The study concluded that certain hair growth measurements are good indicators of baldness severity and provide a more accurate assessment than subjective grading.
1 citations
,
March 2009 in “Hair transplant forum international” The TrichoScan method effectively measures hair growth and helps choose patients for hair restoration surgery.