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This study developed a novel smart deoxyribozyme-based fluorescent sensor that efficiently detects androgen receptor mRNA with high selectivity and can be adapted to target various nucleic acid sequences.

Merkel cells likely attract sensory nerve fibers.

This review concludes that herbal nanoemulgel-based hair dyes, incorporating natural ingredients, enhance dye penetration and retention while providing additional hair and scalp health benefits compared to conventional dyes, though further studies are needed to confirm long-term safety and efficacy.

This review highlights that herbal nanoemulgel-based hair dyes, enriched with natural ingredients, improve dye penetration and retention and offer additional hair and scalp benefits compared to conventional dyes, although further research is necessary to verify their safety and efficacy for long-term use.

This study reports the development of a natural hair-coloring system using size-controlled ink particles from cuttlefish ink combined with chitosan, achieving darker and more uniform black coloration on hair than existing plant-based natural colorants, without the need for metallic mordants.

This study conducted a comprehensive pharmacognostic and phytochemical analysis of Sphagneticola calendulacea stem, identifying tannin-filled cells, various secondary metabolites, and significant physicochemical characteristics, which could aid in authenticating the plant for therapeutic use.

This study reported that both gray and black-brown hair had decreased sulfur content after dyeing with a permanent hair dye mixture consisting primarily of carbon, oxygen, nitrogen, and sulfur.

This study tested a natural hair dye made from papaya seed extract, celery leaf, and avocado, finding color change in animal hair but also noting tissue changes like hyperkeratosis.

An intact skin barrier is crucial to prevent infection in cases of tether-induced tenosynovitis.

This review explores the concept of cosmetic toxicity in Ayurveda, focusing on chemical hazards in cosmetics and their management, but provides no new clinical findings.

Hair care products are important for appearance and self-esteem, and choosing the right ones can help maintain healthy hair.

This study highlights that dyeing and other processing methods can impact the identification of animal species from hair fibers using an amino acid sequence analysis technique.

This study reports that the dye peri-xanthenoxanthene (PXX) can act as an efficient photocatalyst for various radical reactions, including complex dual catalytic processes and the synthesis of an investigational drug intermediate.

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.

This study found that chemical hair dyes caused more significant microstructural damage to hair than high-temperature perms, as observed using a single-detector OCT system.

This study found that the use of hair dyes and hair permanents is not associated with the development or severity of systemic lupus erythematosus.

This study reports that A132, a hair dye ingredient, induces phototoxicity and photogenotoxicity via mitochondrial apoptosis when exposed to sunlight, suggesting potential risks of oxidative stress and hair damage.

This study concluded that a liquid serum formulation delivered two fluorescent dyes to deeper follicular regions more effectively than nanoparticle systems.

This case report describes a unilateral contact dermatitis caused by shoe dye containing 4-aminoazobenzene, which was confirmed with patch testing, highlighting its atypical presentation.

This study developed and tested two methods to accurately quantify hair growth rates in polar, black, and grizzly bears using dye application and isotopically labelled amino acids, revealing growth rate variations by individual and season.

This study used advanced optical imaging techniques to investigate nanoparticle and dye penetration in human skin, finding that nanoparticles mainly resided in the stratum corneum and accumulated in skin folds and hair follicles, while highlighting that sunscreen-based nanoparticles appear unlikely to pose safety concerns.

This study found that capped mesoporous silica nanoparticles conjugated with antibodies selectively released a dye when exposed to finasteride, with low detection limits and stable performance even after storage.

This review highlights that henna (Lawsonia inermis) presents a safer alternative to synthetic hair dyes, though its color range and stability are limited; it emphasizes the need for advanced formulations and global regulatory harmonization to enhance henna's acceptance as a standardized hair dye.

This study reviewed the properties and safety of henna as a hair dye and found it to be safer than synthetic dyes but with limitations in color range and stability.

This article reports preliminary findings on developing a stable emulsion-based semi-permanent hair dye by optimizing emulsification methods, surfactants, and conditioning ingredients.

This study reports that biomass activated carbon fibers derived from metaplexis japonica seed hair effectively adsorb methylene blue dye, demonstrating high capacity and rapid adsorption performance.

This study found that adding urea to a polyethyleneimine solution improved the coloring ability and color fastness of low-temperature hair dyeing with acid dye by enhancing dye penetration into the hair.

This report details a case study where a 40-year-old woman experienced allergic contact dermatitis and angioedema-like symptoms after using PPD-containing hair dye. Patch testing confirmed a positive reaction to PPD, highlighting the substance's potential to cause both T-cell and IgE-mediated hypersensitivity reactions.

This study found that Melamax®, originally developed as an eco-friendly hair dye, provides significant protection against ultraviolet-induced oxidative and inflammatory damage in keratinocytes by modulating gene expression and signaling pathways, highlighting its dual potential for cosmetic coloration and skin photoprotection.

This research reports that multilamellar phospholipid liposomes showed the highest follicular penetration of a water-soluble dye in vitro compared to other cosmetic vehicles, suggesting potential benefits for enhancing hair conditioning and treating hair loss.