145 citations
,
December 1999 in “Journal of Investigative Dermatology Symposium Proceedings” Finasteride 1mg helps reverse hair miniaturization in men and postmenopausal women.
66 citations
,
April 2002 in “Journal of The American Academy of Dermatology” Finasteride increases hair weight and count in men with hair loss.
40 citations
,
June 2009 in “Journal of Cutaneous Pathology” AGA patients have fewer hairs and smaller follicles; T:V ratio above 4:1 may indicate AGA.
37 citations
,
February 2014 in “Journal of Dermatology” Valproic acid increases hair count in men with hair loss.
24 citations
,
September 2012 in “Dermatologic Surgery” The conclusion is that normal scalp hair counts for Taiwanese people were established, showing age-related differences but not sex or scalp location differences.
20 citations
,
April 2016 in “Journal of Cosmetic Dermatology” Methyl vanillate spray increases hair count and hair mass in women with hair loss.
11 citations
,
September 2021 in “Skin Appendage Disorders” Hair count values should be standardized for each scalp region to evaluate hair disorders in Asians.
February 2026 in “Cureus” Two methods reliably measure scalp area and hair count.
March 2023 in “Human Pathology” Hair follicle counts and ratios are helpful in diagnosing hair loss types, but should be used with other specific features for accurate diagnosis.
2 citations
,
January 2019 in “Applied clinical research, clinical trials and regulatory affairs” Different countries have regulations to ensure the safety of hair care products, with some recalling hair straighteners due to high formaldehyde.
Zinc levels and lymphocyte counts might be important in heart disease development.
15 citations
,
June 2019 in “eLife” Activin A and follistatin control when hair cells develop in mouse ears.
6 citations
,
January 2016 in “Indian Journal of Dermatology Venereology and Leprology” Most hair dyes can cause allergic reactions, so test before use.
July 2024 in “Journal of Investigative Dermatology” Allergic contact dermatitis may promote hair growth by activating hair follicle stem cells.
13 citations
,
December 1983 in “Canadian journal of zoology” Heterotypic cell contacts likely help hair matrix cells differentiate during mouse hair follicle development.
9 citations
,
July 2022 in “Journal of Cosmetic Dermatology” The ammonia-free hair dye is safe and improves hair shine, color, moisture, porosity, and combability.
1 citations
,
January 1997 in “Skin research” Hinokitiol and pantothenylethylether in hair products can cause strong allergic reactions.
November 2025 in “Contact Dermatitis” Hair straightening products with glyoxylic acid can cause skin irritation and kidney damage.
Hair care products often cause allergic skin reactions, so testing and new treatments are important.
August 2022 in “Contact dermatitis” Severe allergic reactions to hair dye can trigger hair loss and may be linked to multiple sclerosis.
October 2023 in “Al-Anbar medical journal” The clinic-based hair fall count method is accurate and reliable.
3 citations
,
December 2018 in “PubMed” Most over-the-counter hair loss treatments lack strong evidence of effectiveness and are not FDA-approved.
89 citations
,
August 2018 in “JAMA Dermatology” Contact immunotherapy can improve hair regrowth in alopecia areata patients.
30 citations
,
September 2003 in “Experimental Dermatology” Minoxidil helps prevent stress-caused hair loss in mice.
17 citations
,
December 1951 in “Experimental biology and medicine” Vitamin B12 and aureomycin can reverse or reduce cortisone's negative effects on body and hair growth in rats.
14 citations
,
January 2006 in “Skin pharmacology and physiology” Procyanidin compounds from apples and barley promote hair growth and prevent hair cell death.
5 citations
,
July 2006 in “Contact dermatitis” Ammonium bisulfite in hair bleach can cause facial eczema.
December 2023 in “Materials Today Sustainability” Scientists made glow-in-the-dark dots from human hair that can detect iron, prevent counterfeiting, and reveal fingerprints.
2 citations
,
January 2017 Hair movement can indicate hair quality and health.
Hair movement can indicate hair quality and health.