8 citations
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August 2018 in “Drug testing and analysis” This study observed that ethyl glucuronide (EtG) concentrations in hair decreased significantly during an abstinent period, suggesting possible wash-out effects or other factors affecting EtG levels.
8 citations
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October 2022 in “International Journal of Legal Medicine” This study concluded that drug-distribution measurements using micro-segmental hair analysis are effective for drowned bodies, as natural water containing divalent ions prevents drug washout from hair.
7 citations
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September 2004 in “International Journal of Cosmetic Science” This study demonstrated that visible light lightens blond hair more effectively than ultraviolet light, attacking melanin granules directly, whereas ultraviolet light primarily damages other hair tissues following washing.
1 citations
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January 2018 in “Journal of microscopy and ultrastructure” In this study, researchers used SEM/SDD-EDS to identify waterborne minerals like calcium and aluminum in the scalp hair cuticle of individuals using treated or untreated water for hair washing, finding that prior application of coconut oil or conditioners can prevent calcium uptake.
August 2026 in “International Journal of Cosmetic Science” This study found that shed hairs from the root significantly outnumber broken hairs during hair fall, particularly in Chinese male and female participants, with shedding predominantly occurring during washing.
This study found that extracts from plants like onion peel and walnut possess strong antioxidant properties, making them promising eco-friendly alternatives to synthetic hair dyes, delivering vibrant colors and better wash fastness when combined with oxalic acid.
This study developed a natural hair dye using Coreopsis tinctoria Nutt. extract, finding that it produced yellow to dark brown colors depending on the treatment, with ferrous lactate enhancing dye performance and color stability after washing.
April 2026 in “Cosmetics” This study developed and tested a shampoo with semi-permanent dyes designed to gradually cover gray hair, reporting maintained stability and effective gray–black coloration on high-canities hair tresses through eight wash cycles.
May 2024 in “Indian journal of pharmacy and pharmacology” This in-vitro study reported that a luliconazole-based formulation improved hair cuticle integrity and was more effective than ketoconazole in repairing damaged hair after 5 and 10 washes, with sensory analysis supporting these results. Further human studies are needed to confirm its clinical effects.
April 2024 in “Research Square (Research Square)” This study found that bioconjugating 16-methylheptadecanoic acid (16-MHA) to damaged hair can mimic the protective properties of 18-methyleicosanoic acid (18-MEA), restoring the hair's structural integrity and moisture homeostasis, even after washing.
February 2024 in “International Journal of Progressive Research in Engineering Management and Science” This study evaluated a herbal shampoo containing fermented rice water and traditional herbs and found it to be safe, effective, and efficient in treating hair loss, with pronounced results in foaming, washing, and environmental friendliness.
September 2023 in “Scientific reports” This study observed that testosterone concentrations in hair segments show some stability over time, but are influenced by factors like sebum integration, hair washing frequency, and individual hair growth rates.
November 2021 in “Egyptian Journal of Medical Microbiology” This study found that protective measures against COVID-19, such as prolonged mask-wearing and frequent hand washing, were associated with skin issues, hair loss, and nail brittleness among participants in Iraq.
August 2018 in “Biomedical Journal of Scientific & Technical Research” This study found that covalently binding antimicrobial agents to hair shafts provided antibacterial activity against dandruff and odor-associated bacteria, which remained effective even after several washes.
July 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This study demonstrated that a natural polyherbal shampoo powder, made from ingredients like shikakai and neem, showed promising anti-dandruff and antifungal properties, with good foaming capacity and ease of washability, suggesting it could be a safe and eco-friendly alternative to synthetic shampoos.
April 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This study investigated a herbal hair lotion using natural ingredients like rosemary and fenugreek extracts, finding that the F3 formulation had optimal spreadability, absorbency, washability, and stability, without causing skin irritation.
September 2025 in “Голова и шея.” This study examined human hair follicles exposed to different artificial media and found that Dimephosphone solution better preserved the potassium-sodium ion balance, suggesting its potential advantage for short-term graft storage compared to standard saline, which caused significant potassium "washout.
January 2024 in “Journal of pharmacognosy and phytochemistry” This study evaluated a newly formulated herbal hair mask and found that it meets desirable criteria such as pH, washability, and safety, indicating that it is an effective, safer, and affordable alternative without chemical additives.
September 2023 in “Journal of the American Academy of Dermatology” The researchers reported that using GoodRx.com enables patients to find the most affordable options for purchasing finasteride, a medication often not covered for androgenic alopecia, by comparing prices at local and mail order pharmacies in Washington, D.C.
October 2021 in “Authorea (Authorea)” In this study, using tyrosine as a cross-linking agent for hair perming showed better initial results compared to commercial products, though efficiency decreased after washing without compromising hair strength.
November 2004 in “Qucosa (Saxon State and University Library Dresden)” This study developed analytical methods to better understand hair treatment with cosmetic formulations, revealing that active agents primarily adsorb on the hair surface during short washes.
5 citations
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April 2018 in “Chem” This study introduced a novel graphene-based hair dye that is non-reactive, non-invasive, and eliminates toxic chemicals, while providing durable color, antistatic properties, and efficient heat dissipation, even after 30 washes.
April 2025 in “International Journal of Advanced Research in Science Communication and Technology” This study developed a herbal shampoo using Reetha, Amla, Neem, Bringraj, Jatamanasi, and Aloe vera, reporting that the shampoo met pharmacognostical standards and showed increased hair growth activity, excellent washing and conditioning effects at 1% concentration, and stability with no skin irritation.
August 2026 in “Zenodo (CERN European Organization for Nuclear Research)” In this study, a polyherbal shampoo formulated with extracts of Reetha, Fenugreek, and Nagarmotha was evaluated for its physicochemical properties, showing effective dirt dispersion, high foam stability, and satisfactory washing capacity, though further research on stability and safety is needed for commercialization.
June 2025 in “OPAL (Open@LaTrobe) (La Trobe University)” This study found that a synthetic polyphenol, dimeric 1,2,4-benzenetriol (diBTO), can coat gray hair and gradually oxidize, creating a resistant brown layer similar to apple browning, which offers a practical hair dyeing solution that withstands washing and reduces the need for long dyeing sessions.
17 citations
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July 2019 in “Scientific reports” This study investigated lipid loss in hair caused by surfactants and found that surface and internal modifications can significantly protect different lipids from depletion, with internal modification preventing 52.0 to 81.3% of lipids in certain groups.
15 citations
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July 2004 in “Journal of Wildlife Diseases” In this study, ivermectin treatment in affected Columbian black-tailed deer was associated with increased weight gain, reduced parasites, and faster hair regrowth compared to untreated deer.
4 citations
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April 2016 in “American Journal of Primatology” This study found significant differences in alopecia rates among rhesus macaques based on their previous housing facilities, suggesting that factors beyond current environment may influence alopecia.
1 citations
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May 2016 in “Journal of Veterinary Diagnostic Investigation” In this study, exotic lice were found to be widespread among mule deer in California, with younger age classes and low blood selenium concentrations being significantly associated with infestation.
November 2025 in “International Journal of Biological Macromolecules” This study introduced an eco-friendly enzymatic hair dyeing process utilizing laccase-catalyzed polymerization of hematoxylin, achieving intense, long-lasting color comparable to commercial dyes while enhancing hair strength and offering antioxidant and UV-shielding benefits.