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This study found that metabolite levels in hair samples differ significantly by hair color and segment, leading to recommendations for best practices in hair metabolomic studies.

This study developed a simple and cost-effective chromatographic method for simultaneously analyzing betamethasone dipropionate and calcipotriol, achieving rapid separation within 7 minutes suitable for routine applications.

This study developed and validated a simple and cost-effective spectrophotometric method to accurately determine Aminexil in cosmetic formulations containing niacinamide and pyridoxine.

This review highlights that microRNAs (miRNAs) play crucial roles in hair follicle development and cycling in cashmere goats, detailing recent advances in understanding their regulatory functions and potential applications in improving cashmere fiber quality and diagnosing hair disorders.

Made 8 minoxidil samples; 1 cocrystal, 7 salts formed.

This study proposed a simple, rapid permanganometric method for determining minoxidil concentrations in pharmaceutical samples, offering comparable accuracy to chromatographic methods with recovery rates of 94.5 to 95.2%.

This research found that heavy metal concentrations of arsenic, lead, cadmium, and iron were significantly higher in human hair samples from 100 years ago compared to today's levels in southern Poland, with a median decrease of 69–95%.

This study found that testosterone concentrations in hair samples were moderately stable over three months, with cosmetic treatments like coloring increasing testosterone levels, while natural hair color in untreated hair did not affect testosterone measurements.

This study developed and validated a simple, cost-effective UV–Visible spectrophotometric method for estimating finasteride in pharmaceuticals, demonstrating good linearity, accuracy, precision, and sensitivity according to ICH guidelines, making it suitable for routine quality control.

This study developed a new analytical method to identify a wide range of endocrine disrupting compounds in full-term amniotic fluid, revealing diverse substances with potential endocrine activity.

This study used in-lab hair samples to show that cut hairs found at a crime scene and on a suspect can be matched to confirm they were from the same individual.

This review highlights how forensic drug analysis in hair using modern instrumental techniques offers advantages such as easy sample collection and chronological tracking of drug use, emphasizing its value for law enforcement and other applications.

This study found that hair from the vertex posterior is a reliable sampling region for detecting zolpidem intake, showing consistent drug concentration and peak position compared to other scalp regions.

This study evaluated the physicochemical properties of Neelibhringadi keratailam and found significant variations in market samples compared to a prepared sample, indicating potential quality control issues.

Researchers developed a quick and sensitive way to measure finasteride in blood using a small sample size.

In this laboratory study, researchers developed a multifunctional organic hair cream with various natural extracts, finding that the cream with 15% extracts demonstrated higher physical stability, hair strength, and antimicrobial activity compared to lower concentration samples and synthetic alternatives.

This study developed a liquid chromatography with tandem mass spectrometry method to detect sex hormones in health supplements from Hanoi, Vietnam, finding three out of 16 samples contained sex hormones, including banned testosterone at low levels (~0.5 mg/kg).

In this study, bleaching and perming were found to significantly reduce opiate concentrations in both spiked and naturally opiate-positive human hair samples.

This study identified distinct human and bacterial protein profiles in sebaceous follicular casts, with acne samples showing proteins linked to inflammation and normal samples showing proteins involved in stress protection.

This review evaluates hair growth measurement methods for human scalp hair, suggesting that combining highly resolutive analytical approaches with global calibrated methods is recommended for assessing hair changes in clinical settings.

In this study, a novel electrochemical sensor using a molecularly imprinted polymer was developed for the sensitive detection of minoxidil, successfully measuring its concentration in real samples.

This study found that excessive heat caused the most significant structural changes in hair from Caucasian and Afro samples, especially when combined with other treatments like bleaching and straightening.

This study found that hair testosterone concentrations show some consistency over time, but factors like hair washing and individual growth rates influence these levels, suggesting the need for careful sampling and analysis adjustments.

The researchers reported that epitestosterone treatment reduced eicosanoid levels generated by cyclooxygenases and lipoxygenases in rabbit liver samples with carrageenan-induced inflammation.

This study reports that an electrochemical biosensor using a gold and palladium-modified electrode effectively detects levodopa and uric acid in various samples, offering improved performance over previous electrodes.

This study developed a new HPLC method for detecting prohibited substances like minoxidil and hydrocortisone in cosmetic products, achieving high sensitivity and successful application to real-world samples.

This study found that follicular density and various hair growth ratios differ statistically between nonscarring and scarring alopecia, though significant overlap exists due to factors like sample size and scalp variation.

This study developed a new method for detecting 30 hormones in anti-aging functional foods, demonstrating good sensitivity and reliability, and identified seven hormones in four out of 14 samples tested.

This study developed a validated method to detect prohibited drugs in dietary supplements, finding minoxidil, triaminodil, and finasteride in some samples.

This study developed a validated HPLC method for accurately estimating dutasteride and its related compounds in capsules, suitable for routine and stability sample analysis.