3 citations
,
April 2021 in “Journal of Cosmetic Dermatology” The micrometer caliper is a reliable tool for measuring hair diameter for FUE surgery.
2 citations
,
April 2023 in “Archives of Aesthetic Plastic Surgery” The phototrichogram is better for measuring hair thickness.
February 2024 in “JAAD International” Measuring the variety in hair thickness can help diagnose male pattern baldness in Korean men.
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.
31 citations
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August 2001 in “PubMed” TrichoScan accurately measures hair growth and showed improved hair counts and thickness after finasteride treatment.
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.
25 citations
,
June 2003 in “Journal of Investigative Dermatology Symposium Proceedings” Phototrichogram and hair diameter measurements are effective, noninvasive ways to assess hair growth and detect early hair loss, with the most common pattern being reduced hair density.
1 citations
,
May 2016 in “Dermatologic Surgery” The document concludes that using a phototrichogram with a protractor and tapeline is a reliable and noninvasive way to measure hair loss.
September 2022 in “International Journal of Trichology” Trichoscopic measurements help determine the severity of female pattern hair loss.
29 citations
,
March 2008 in “Dermatologic Surgery” The Cross-section Trichometer is a new tool that can measure hair quantity and detect hair loss and growth.
9 citations
,
January 2011 in “Skin Research and Technology” The new automatic tool accurately measures hair thickness and is reliable.
4 citations
,
February 2018 in “Journal of Cosmetic Dermatology” Platelet-rich plasma injections made hair thicker for both men and women, with a greater effect in women.
3 citations
,
January 2021 in “Hair transplant forum international” The Hair Diameter Index (HDI) was created to help plan hair restoration surgery after finding that visual hair density is linked to hair count and thickness, not volume.
61 citations
,
April 2012 in “British Journal of Dermatology” Caucasian women's hair appears thickest in their 20s, with perceived thinning after mid-30s due to both decreasing density and diameter.
63 citations
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October 1972 in “British Journal of Dermatology” Women with thinning hair have thinner hair strands than women without hair loss.
10 citations
,
July 2017 in “Archives of Plastic Surgery” Hair thickness decreases from the upper to lower areas of the back of the head, affecting hair transplant results.
26 citations
,
March 1986 in “Clinical and Experimental Dermatology” Scalp hair grows at 0.37 mm/day, forearm hair at 0.18 mm/day, and thigh hair at 0.30 mm/day, with no significant differences found in people with certain hair conditions.
30 citations
,
April 2009 in “Dermatologic Surgery” TrichoScan helps identify subtle hair thinning in women with androgenetic alopecia.
November 2015 in “Summit (Simon Fraser University)” Surgical stress temporarily changes hair fiber dimensions, returning to normal after four weeks.
July 2012 in “British Journal of Dermatology” Women generally want more hair volume, which becomes a concern around menopause due to hair loss.
1 citations
,
July 2008 in “Expert Review of Dermatology” Normal hair thickness varies by scalp area and a mix of hair thicknesses is typical in healthy individuals.
9 citations
,
July 2014 in “Skin research and technology” Stretching damages Caucasian hair's structure more easily than Asian hair.
94 citations
,
July 1991 in “Clinical endocrinology” Cyproterone acetate at 2mg daily is as effective as higher doses for treating excessive hair growth in women.
18 citations
,
March 2010 in “Gynecologic and obstetric investigation” The oral contraceptive alone is the preferred treatment for hirsutism, as adding the GnRH analog showed no significant benefit.
September 2001 in “PubMed” The new X-ray technique allows for precise and non-destructive measurement of elements in hair, creating the first database of its kind for a specific ethnic group.
9 citations
,
March 2005 in “International Journal of Cosmetic Science” The torsional method effectively evaluates hair damage and the performance of hair care ingredients.
4 citations
,
November 2011 in “Archives of Dermatology” The photographic method for measuring facial hair density is reliable and valid but needs further testing on different hair densities and skin colors.
October 2024 in “UNESP Institutional Repository (São Paulo State University)” Straightening and dyeing damage hair structure.
October 2023 in “Animal production science” Vitamin A deficiency changes cattle hair structure, while pregnancy may improve it, suggesting hair can indicate cattle health.
17 citations
,
February 2022 in “Microscopy Research and Technique” Scanning electron microscopy and elemental analysis can help identify animal species by their hair patterns and elements.