11 citations
,
January 2004 in “Exogenous dermatology” Outside factors like grooming, chemicals, and the environment can damage hair and cause disorders.
3 citations
,
March 2010 in “International Journal of Cosmetic Science” Functionalized silicones improve hair appearance, combing, and manageability.
Modern hair styling products don't repair hair but improve its surface and stability.
Gray hair affects hair's movement and appearance, making it less bouncy and more wavy.
January 1991 in “Journal of Society of Cosmetic Chemists of Japan” Hair treatments can damage hair by changing its chemical content.
25 citations
,
January 2011 in “Pharmacognosy magazine” Nardostachys jatamansi DC compounds help promote hair growth.
1 citations
,
January 2022 in “Rasayan journal of Chemistry” Albizia saponaria bark ethanol extract, particularly at 15%, promotes hair growth in rabbits.
January 2003 in “Research Portal (King's College London)” Hair color affects light reflection, with black hair having higher cuticle angles and lighter hair showing less specular reflection.
January 2023 in “Journal of cosmetic dermatology” Fractional lasers effectively treat alopecia areata, especially when combined with minoxidil or cortisol.
55 citations
,
February 2014 in “Journal of Structural Biology” Human hair has a complex, variable structure with a consistent matrix and double-twist pattern.
26 citations
,
November 2016 in “European Journal of Clinical Pharmacology” Valproic acid helps delay hair loss and increases survival time for high-grade glioma patients undergoing radiation therapy.
13 citations
,
June 2005 in “PubMed” Green tea compounds significantly increased hair regrowth in some mice.
11 citations
,
October 2021 in “Carbohydrate Polymers” Ginkgo biloba polysaccharides may reduce inflammation and promote hair growth in mice with hair loss.
9 citations
,
April 2019 in “Journal of structural biology” Hair's internal fibers are arranged in a pattern that doesn't let much water in, and treatments like oils and heat change how much water hair can absorb.
8 citations
,
November 2019 in “Journal of Trace Elements in Medicine and Biology” Higher hair iron levels are linked to changes in brain structure and function.
6 citations
,
January 2023 in “npj regenerative medicine” Transplanting growing hair follicles into scars can help regenerate and improve scar tissue.
6 citations
,
November 1960 in “Experimental Biology and Medicine” Hair growth stages don't significantly change lipid content in mouse skin.
5 citations
,
September 2020 in “Molecules” Extracts from three Polynesian plants were found to promote hair growth by affecting cell growth and gene expression related to hair.
4 citations
,
January 2015 in “Sen'i Gakkaishi” Hair and wool strength is affected by the number and type of bonds in their protein structures, with hair having more protein aggregates than wool.
2 citations
,
September 2020 in “International journal of radiology & radiation therapy” Radiotherapy can cause rare changes in hair color, which should be discussed with patients.
July 2025 in “The Egyptian Journal of Hospital Medicine” Preparing scars with PRP or CO₂ laser improves hair transplant success.
Eclipta alba L. (Urang-Aring) can help treat hair loss.
September 2023 in “Nature Communications” Rare genetic variants in five specific genes are linked to male-pattern hair loss but only account for a small part of the risk.
The human scalp has different types of pigment cells in hair follicles with varying abilities to produce pigment.
April 2019 in “Radiotherapy and oncology” HPV infection is linked to better survival in advanced anal cancer, higher radiation doses improve survival, especially in HPV-negative patients, and prostaglandin E₂ pretreatment can protect mouse hair follicles from radiation damage.
October 2025 in “Preprints.org” Adipose mesenchymal stem cells are best for skincare because they reduce inflammation and are safe and effective.
January 2015 in “Springer eBooks” Hair damage shows as fragility, dullness, and discoloration, varies by ethnicity, and is worsened by cosmetic procedures and diseases.
2 citations
,
May 2025 in “Skin Appendage Disorders” Silicones are important for hair care but should be used wisely to balance benefits and environmental concerns.
January 2024 in “Journal of cutaneous and aesthetic surgery” Scalp injuries and harsh hair care can cause severe hair matting in children.
Human hair keratins can self-assemble and support cell growth, useful for biomedical applications.