research Standardizing the 60-Second Hair Count
Men typically shed about 10 hairs in 60 seconds, and this amount doesn't increase with age.
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research A Single-Scar Technique for Donor Harvesting in Hair Transplantation Surgery
A new hair transplant method creates one appealing scar, uses donor hair better, and speeds up surgery.
![Synthesis and In Vitro Study of 17β-[N-Ureylene-N,N′-Disubstituted]-4-Methyl-4-Aza-5α-Androstan-3-Ones as Selective Inhibitors of Type I 5α-Reductase](/images/assets/d19df8a7-8de6-4430-8a0d-4ffa1f502985/small/15608.jpg)
research Synthesis and in vitro study of 17β-[N-ureylene-N,N′-disubstituted]-4-methyl-4-aza-5α-androstan-3-ones as selective inhibitors of type I 5α-reductase
New compounds were made that effectively block a specific enzyme related to androgen conditions.
research Commentary: Hair Transplantation and Female Hairlines
Different women have various natural hairline shapes, and understanding this is important for designing hair transplants.
research Internal structural changes in age‐related curved hair due to cyclical extension: An IR spectroscopy study
Age-related hair curvature increases due to internal structural changes from grooming.
research Comparative study of male and female human hair: A microscopic analysis.
Male and female human hairs have different microscopic structures that can help in forensic analysis.
research New Donor Excision Design for Better Hair Alignment in Hair Restoration Surgery
The new triangular flag-shaped design for incisions in hair transplant surgery provides better hair alignment and cosmetic appearance without extra scarring, especially for patients with specific hair directions.
research Acquired progressive kinking of the hair in a Korean female adolescent
A Korean girl developed kinky hair without known cause or effective treatment.
research Cultural evolution as a possible triggering or causative factor of common baldness
Certain cultural hair practices might cause baldness by affecting natural hair oils and stem cell delivery to hair follicles.
research Development of a New Grading Scale for Evaluating Overall Hair Density
A new reliable scale improves accuracy in measuring hair density and treatment response.
research The Rho GTPase regulator ARHGEF3 orchestrates hair placode budding by coordinating cell fate and P-cadherin patterning in mice
ARHGEF3 is essential for proper hair follicle development in mice.
research An investigation of the association between structural proteins and lipids with scalp hair curvature
Lipids play a key role in determining hair curvature.
research Acquired curved hair is caused by fusion of multiple hair matrix cells
Curved hair can develop when hair cells merge abnormally during growth.
research 5-Aminolevulinic acid improves chicken sperm motility
5-Aminolevulinic acid can help chicken sperm move better at the right amount.
research 570 DNA dioxygenases Tet1/2/3 control cell differentiation in the hair follicle keratinocytes via modulating the activity of BMP signaling pathway
Tet1/2/3 enzymes affect hair follicle cell development by influencing BMP signaling.
research Restoration Mechanism of Hair Using Hematin as Treatment Agent
Hematin in shampoo helps repair and straighten damaged hair.
research Naturally Occurring Hairlines in Non-balding Oriental Men of East and Southeast Asian Origin
Older East and Southeast Asian men need less hair density for hair restoration satisfaction, and natural hairline features should guide surgery plans.
research A case of altered hair texture after resolution of alopecia areata
New hair after alopecia areata can be thinner and change color but usually keeps the same shape.
research Mechanism of Action of Bis-Ethoxydiglycol Cyclohexane 1,4-Dicarboxylate in Alleviating Wavy Hair Undulation
BECD helps straighten wavy hair by reducing undulation.
research Permanent waving and hair straightening
Thioglycolate lotions are the most popular method for permanent waving and hair straightening.
research What do we need to know about hair straightening?
Modern hair straightening improves manageability and strength while maintaining natural waves.
research Hair perms/straighteners and styling agents
Hair perms or treatments seem safe to use up to 3 to 4 times during pregnancy.
research Woolly hair nevus
A 17-year-old developed woolly hair nevus in adolescence, which is unusual, and over time the hair darkened and straightened slightly, but microscopic changes persisted.
research Characteristic Microstructure of Curved Human Hair
Curved human hair has different structures on each side, which might cause its shape and is similar to wool.
research Analysis of structural changes in permanent waved human hair using Raman spectroscopy
Permanent waving weakens hair by altering its protein structure.
research J. Cosmet. Sci., 59, 203-215 (May/June 2008) �Effects of permanent waving on changes of protein and physicomorphological properties in human head hair
Permanent waving damages hair protein and weakens hair, especially with repeated treatments using sodium thioglycolate.
research Hair care products: waving, straightening, conditioning, and coloring
Proper haircare and communication with doctors are key to managing hair loss and avoiding damage.
research Structural change of keratin protein in human hair by permanent waving treatment
Permanent waving damages hair by disrupting its keratin structure.
research Woolly Hair in Two Siblings
Two siblings have a rare genetic condition causing curly, coarse hair.
research Shape Variability and Classification of Human Hair: A Worldwide Approach
Human hair can be classified into eight types based on physical features, not ethnicity.