3 citations
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January 2012 Hair cortisol analysis shows sweat affects cortisol levels, and severe OSA may increase stress, but CPAP treatment doesn't significantly reduce physiological stress.
Adequate vitamin D might lower, and high hair chromium might increase DNA damage in obese women.
October 2024 in “AL-MIKRAJ Jurnal Studi Islam dan Humaniora (E-ISSN 2745-4584)” A 30% papaya skin extract hair tonic effectively promotes hair growth.
December 2021 in “Prosiding Seminar Nasional Kesehatan” Bandotan leaf extract effectively promotes hair growth.
182 citations
,
December 2007 in “BJCP. British journal of clinical pharmacology/British journal of clinical pharmacology” Hair follicles significantly increase the speed and amount of caffeine absorbed through the skin.
98 citations
,
November 2002 in “Contact Dermatitis” Many people had severe allergic reactions to a common hair dye ingredient, causing them to seek medical care and miss work.
42 citations
,
December 2019 in “Steroids” Body hair isn't a good substitute for scalp hair in steroid analysis.
16 citations
,
March 2013 in “Clinica Chimica Acta” Cortisol and cortisone release from hair increases in steps over time during incubation.
15 citations
,
July 1998 in “PubMed” Fentanyl accumulates differently in hair from internal use compared to external exposure.
10 citations
,
January 1980 in “Ultrastructural pathology” Green hair has high copper levels due to contaminated water and damaged hair cuticles.
8 citations
,
October 2014 in “Journal of analytical toxicology.” Chemical hair straightening significantly reduces detectable drug levels in hair.
7 citations
,
January 2010 in “Pharmacognosy Research” The tobacco leaf extract may help hair grow and could treat hair loss.
7 citations
,
September 2025 in “Psychoneuroendocrinology” Hair analytes decrease with storage, so analyze within six months.
4 citations
,
February 2022 in “Journal of Pharmaceutical and Biomedical Analysis” The conclusion is that a new method can measure caffeine and drugs in hair, finding caffeine abusers have 70 times more caffeine than normal, with a proposed cut-off value for abuse.
3 citations
,
October 2009 in “Iranian Journal of Basic Medical Sciences” Buxus wallichiana extract improves hair growth and has antioxidant properties, with oral use more effective than topical.
1 citations
,
August 2023 in “Expert opinion on drug delivery” Cedrol-loaded microneedles effectively promote hair growth.
1 citations
,
October 2017 Suruhan extract made rabbit hair grow longer but didn't increase hair thickness.
February 2026 in “ACS Biomaterials Science & Engineering” Human stem cells can help grow hair for regenerative medicine.
January 2026 in “Biospecies” A 70% black ear mushroom extract hair tonic effectively stops M. furfur growth.
Hair test results can be misleading due to external contamination, so they shouldn't be used alone to assess long-term drug use.
63 citations
,
October 2013 in “Dermatologic Surgery” Platelet-Rich Plasma (PRP) increases the number of new hair follicles and speeds up hair formation.
43 citations
,
October 2002 in “International Journal of Cosmetic Science” All three shampoos reduced dandruff and hair loss, but ketoconazole and piroctone olamine also made hair thicker.
42 citations
,
January 2009 in “Colloids and Surfaces B: Biointerfaces” A certain surfactant sticks to human hair, making it change from water-repelling to water-attracting, which could help in hair conditioning.
36 citations
,
March 2007 in “Journal of Chromatography B” Hair analysis can detect testosterone in horses after drug administration.
32 citations
,
May 2018 in “Cell Cycle” Melatonin helps Cashmere goats grow more hair by affecting certain genes and cell pathways.
31 citations
,
January 2019 in “Journal of Cutaneous Medicine and Surgery” Platelet-Rich Plasma (PRP) therapy can promote hair growth and improve facial aesthetics, including reducing acne scars and facial burns, and it works best with three initial monthly injections.
26 citations
,
October 2007 in “Experimental Dermatology” L-Carnitine-L-tartrate may help hair grow and prevent hair loss.
23 citations
,
January 2020 in “Frontiers in Pharmacology” Dihydrotestosterone affects hair growth by changing the Wnt/β-catenin pathway, with low levels helping and high levels hindering growth.
23 citations
,
August 2019 in “Proceedings of the National Academy of Sciences of the United States of America” Pollution exposure speeds up hair damage.
23 citations
,
October 2006 in “Journal of Dermatological Science” Ethosomal minoxidil improves hair growth by penetrating deeper into skin and shortening hair cycle.