Acidic sandy clay damages archaeological hair the most, while dry conditions preserve but make it brittle; silicone oil can help keep the hair flexible.
Hair test results can be misleading due to external contamination, so they shouldn't be used alone to assess long-term drug use.
June 2008 in “British Journal of Dermatology” Herpes gestationis is linked to certain antigens, atopic eczema affects T cell populations and may be eased by breastfeeding, higher doses of anti-androgen treatment can improve androgenic alopecia, topical minoxidil increases hair thickness, long-term methotrexate therapy can cause liver fibrosis in psoriasis patients, and Lichen Sclerosus et Atrophicus patients aren't at higher risk for autoimmune disorders.
January 2008 in “Durham e-Theses (Durham University)” Hair follicle stem cells are similar to mesenchymal stem cells and can become neural-like cells under certain conditions.
January 2006 in “The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology” Rubus coreanum may help hair growth but not through the tested mechanisms, and none of the herbal extracts help with acne.
Isotretinoin and tazarotene help treat acne, while minoxidil and finasteride promote hair growth.
September 1998 in “JEADV. Journal of the European Academy of Dermatology and Venereology/Journal of the European Academy of Dermatology and Venereology” The document concludes that individualized treatments for hair issues are effective, certain hair changes can indicate neurocutaneous diseases, specific lotions improve skin health, laser hair removal works but needs more study on long-term effects, men's cosmetics are diverse, peeling is effective but can have side effects, and facial pigmentation is often due to overactive skin cells.
January 1990 in “Springer eBooks” Some chemicals can permanently or temporarily remove color from skin and hair, which can be distressing and is not well-regulated in cosmetics.
September 2025 in “Experimental & Molecular Medicine” Small molecules KY19382 and KY19334 may help treat skin cancer by reducing CDK1 levels and blocking harmful cell signals.
June 2025 in “Mağallaẗ ʻulūm al-rāfidayn” New pyrazole derivatives may help treat hair loss, but more testing is needed.
February 2024 in “Research Square (Research Square)” People today have lower levels of arsenic, lead, cadmium, and iron in their hair than people did 100 years ago.
Pomegranate is beneficial in various medical fields.
January 2023 in “International Journal of Research Publication and Reviews” Some herbal ingredients like linalool and tea tree oil have anti-dandruff properties and are safe for use in shampoos.
Avicennia marina extract and avicequinone C can potentially promote hair growth and treat hair loss by interfering with hair loss mechanisms and boosting growth factors.
Integrin alphavbeta6 is important for wound healing and hair growth, and blocking it may improve these processes.
July 2020 in “Environmental Science and Pollution Research” Finasteride harms invertebrates' survival and burial ability.
25 citations
,
June 2011 in “International journal of pharmaceutics” Nanoparticles effectively deliver water-insoluble drugs to hair follicles, stimulating hair growth without irritating the skin.
263 citations
,
February 2013 in “Wiley interdisciplinary reviews. Nanomedicine and nanobiotechnology” Polymeric nanoparticles show promise for treating skin diseases.
66 citations
,
September 1982 in “Biochemical Pharmacology” Liver enzyme helps minoxidil work better for blood vessel relaxation.
61 citations
,
January 2019 in “American Journal of Clinical Dermatology” The cause of Frontal Fibrosing Alopecia is unclear, diagnosis involves clinical evaluation and various treatments exist, but their effectiveness is uncertain.
47 citations
,
March 2018 in “Journal of Pharmaceutical and Biomedical Analysis” Researchers identified new compounds in Platycladi Cacumen and found variations in its flavonoid content, which could aid in its quality control.
46 citations
,
May 2012 in “Molecular and Cellular Endocrinology” Human skin produces sex hormones like estrogen and testosterone, influenced by ARO and StAR, which may affect skin elasticity and hair growth.
43 citations
,
November 2019 in “American Journal of Clinical Dermatology” FAGA diagnosis uses blood tests and trichoscopy, with treatments like topical minoxidil, oral anti-androgens, and hormone-modulating drugs.
39 citations
,
December 2013 in “Phytotherapy Research” Safflower (Carthamus tinctorius) extract helps hair grow and could be used in hair products.
29 citations
,
February 1996 in “Journal of Chromatography B: Biomedical Sciences and Applications” New method detects finasteride in plasma quickly and accurately without clean-up.
23 citations
,
January 2019 in “International Journal of Dermatology” Finasteride improves hair growth and reduces hirsutism in women, but side effects and optimal dosages need further research.
18 citations
,
November 2013 in “Molecules and Cells” New culture method keeps human skin stem cells more stem-like.
15 citations
,
April 2008 in “Steroids” The more lipophilic the progesterone derivative, the better it binds to androgen receptors and has antiandrogenic effects.
13 citations
,
September 2012 in “Critical Reviews in Food Science and Nutrition” Wheat straw is valuable for its health benefits and various industrial uses.
12 citations
,
July 2021 in “Scientific Reports” Glutamic acid helps increase hair growth in mice.