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This review highlights that human hair is a valuable biological matrix for clinical and toxicological analyses, demonstrating its applicability in detecting various active substances from different pharmacological classes.

This study describes an analytical technique combining field-enhanced sample stacking with dispersive liquid-liquid microextraction, offering improved sensitivity for detecting finasteride and its metabolite in urine samples from patients treated for androgenetic alopecia.

This study developed and validated a method using hair samples to simultaneously detect bisphenols and parabens, enabling the quantification of these endocrine disruptors in a hospital population’s hair.

This review highlights the importance of standardizing pre-analytical procedures for collecting and extracting samples from uncommon biological specimens like breast milk and sweat in clinical metabolomics, to enhance diagnostic and biomarker discovery efforts while minimizing contamination and bias.

This study found that while parabens in haircare products were within legal limits, all samples contained dibutyl phthalate, raising concerns about chronic exposure to endocrine disruptors.

This study presents a DNA-analytical method that can reliably identify and differentiate cashmere, fine wool, yak, and camel hair fibers in both untreated and processed samples.

This review examines recent advancements in analytical techniques used to quantify dutasteride, a medication for enlarged prostate, in various biological samples and its commercial forms, emphasizing methods such as HPTLC, GC-MS, and HPLC.

This study developed a new, simple, and economical RP-TLC method with densitometry that is suitable for routine analysis of finasteride in tablet dosage form, meeting analytical validation criteria.

This review examines recent advancements in green and emerging microextraction techniques, such as SPME and DLLME, for more sustainable hormone detection in biological samples, emphasizing environmentally friendly solvents and bioanalytical applications.

This study suggests that chest, arm, leg, and beard hair samples may be viable alternatives to scalp hair for monitoring long-term alcohol intake, although body hair is more typically collected from men.

This study observed that low serum ferritin and vitamin D levels may contribute to diffuse hair loss in women.

This letter highlights that the effectiveness of skin self-photography for melanoma detection has not been evaluated, although it could be a cost-effective option for patients without access to professional skin photography.

This study developed and tested a finasteride suspension that retains over 94.3% of its initial concentration for up to 90 days at room temperature, finding no airborne finasteride exposure during formulation handling.

This article reviews the industrial applications and chemical composition of castor oil, highlighting its role as a raw material in producing various products, but reports no new results.

This meta-analysis found that laser-based therapies showed promising clinical benefits in treating scarring alopecias, such as disease stabilization and symptom improvement, but highlighted the need for high-quality randomized controlled trials due to serious risk of bias and methodological limitations in existing studies.

In this study conducted at a tertiary dermatological clinic, researchers identified and described the clinical, dermoscopic, and histopathological features of preclinical folliculitis keloidalis, including novel dermoscopic findings such as perifollicular scale, which was associated with fibrosis.

This study introduces three spectrophotometric techniques for accurately determining finasteride and tadalafil in their combined pharmaceutical form, demonstrating their sustainability, sensitivity, and suitability for quality assurance, alongside a dissolution study following FDA guidelines.

This collection from the 2021 Manfred Donike Workshop outlines advancements in doping detection, highlighting new test methods and challenges, with a focus on steroidal substances, peptide hormones, and gene doping analysis.

This article reviews analysis techniques in LC-MS/MS and discusses the potential use of a novel in-sample calibration curve method, but reports no new experimental results.

This study reported high analytical performance of an RMP for DHT quantification, with the ability to differentiate between 5α-DHT and 5β-DHT isomers, making it suitable for routine assay standardization and clinical sample evaluation.

This review discusses the use of hair analysis for detecting misuse of drugs in livestock, covering hair biology, drug incorporation, sampling methods, and analytical techniques, but reports no new findings.

This study developed a precise and simple HPLC method for estimating tamsulosin and finasteride simultaneously in pharmaceutical forms, demonstrating good precision and potential usefulness for combined dosage analysis.

This study reports an easy colorimetric method for detecting nitrite in water using minoxidil, which may be suitable for various analytical applications due to its effective detection range.

This study describes an efficient gas chromatography-mass spectrometry method for detecting estrone and 17 beta-estradiol concentrations in hair, finding differing levels in male and female samples.

This study found that treating human hair with vitamin E and γ-oryzanol significantly reduced UV-B-induced structural damage, with γ-oryzanol providing greater protection, especially in female hair samples. The findings highlight these compounds' potential as cost-effective solutions for preserving hair integrity against UV damage.

This study found significant structural and compositional differences in hair affected by alopecia areata compared to healthy hair, using a range of physico-chemical investigation methods.

This study investigates calcium and phosphorus accumulations in the hair of mummies from the Taklamakan desert and debates their exogenous or endogenous origin.

This reprint reviews 14 papers on advances in solid-phase microextraction techniques for bioanalysis, reporting no new results.

This commentary discusses the challenges of matrix effects in LC–MS analysis and introduces the concept of a matrix effect factor using stable isotopically labeled internal standards to improve analysis reliability.

This study found that codeine incorporation in guinea pig hair varied with pigmentation and was highest in black hair, suggesting the role of eumelanins in drug binding.