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In this study, the authors found that the shoulder guard hair of captive sika deer most accurately reflects dietary information during winter coat growth, useful for analyzing wild deer hair samples.

This study suggests that the shoulder guard hair of captive sika deer is effective for hair analysis, providing insights into growth patterns and isotopic changes that could aid future research on wild deer using hair samples.

In this study, the isotopic fractionation between tissues and diets of captive Japanese macaques was quantified, particularly noting hair's response to diet changes in controlled conditions, but these findings underscore the complexity of reconstructing long-term dietary history.

This study found that high-resolution tusk isotope profiles from an African elephant can serve as a proxy for the seasonality of diet and precipitation, helping to reconstruct vegetation and climate in modern and fossil ecosystems.

In this study, adding δ34S isotope analysis to models modestly improved precision in estimating grizzly bears' salmon and terrestrial diets, but contributed little new information.

This study analyzed stable isotopes in animal fibers from Bronze and Iron Ages sites in Xinjiang, China, revealing that caprines and cattle primarily consumed C3 plants, while some Iron Age individuals showed unusual high C4 plant intake likely linked to millet foddering practices.

In this study, researchers observed that graded calorie restriction in mice led to changes in stable isotope ratios and elemental content in bone collagen and hair keratin, potentially indicating intensified mobilization of endogenous proteins and altered bone collagen structure with increased dietary stress.

This study hypothesizes that a mummified 19th Century girl in San Francisco died of severe undernourishment potentially due to a bacterial-borne disease, highlighting historical health challenges mitigated by modern sanitation and medicine.

The wolves suspected of man-eating in the 1880s likely ate very little human flesh and mostly consumed a diet similar to herbivores and omnivores.

This study developed and validated a mass spectrometric method to measure hydroxy-androgens in serum, which aids in understanding androgen synthesis in castration resistant prostate cancer.

This study found that young women with female-pattern hair loss exhibit increased testosterone production rates while dihydrotestosterone production rates remain within or below the normal range.

This review discusses the use of anabolic-androgenic steroids in sports and outlines current methods for detecting urinary steroid doping, particularly testosterone, but reports no new experimental findings.

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 review discusses the use of stable isotope analysis in primate hair to study feeding behavior and reports no new results; the authors call for methodological refinement in field and lab procedures.

This study found that carbon and nitrogen isotope analysis of cattle hair reflects dietary and farm system differences, offering insights into cattle nutritional ecology and agroecosystem characteristics.

In this study, correlations between urinary and serum androgen metabolites were examined in girls aged 6-13, revealing that summed urinary metabolites strongly correspond with circulating androstenedione and testosterone levels, though individual variations depend on participant characteristics such as age and body measurements.

In this study, silver oxide-based nanoparticles were used to ionize analytes and detect specific target molecules through adduct formation with silver isotopes, facilitating signal correlation with these molecules.

This study suggests that epitestosterone may play a role in regulating androgen-dependent processes like prostate growth and body hair distribution by counteracting testosterone's actions.

This study observed that eliminating positional error in hair segment analysis can improve understanding of changes in isotopic composition, aiding the identification of pathological conditions and dietary patterns.

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 study developed a new measurement procedure using isotope dilution-liquid chromatography-tandem mass spectrometry for accurate quantification of DHEAS in human serum or plasma, demonstrating high selectivity, sensitivity, and low measurement uncertainty, making it suitable for routine standardization and clinical evaluation.

In this study, the Trivedi Effect®-Consciousness Energy Healing Treatment was reported to significantly increase the solubility and isotopic abundance ratios of flutamide, potentially improving its stability and efficacy.

This study reported that using 2D solid-state NMR techniques on extensively labeled mouse fur improves resolution in detecting chemical shifts and secondary structure features, potentially aiding the analysis of the effects of commercial or therapeutic treatments on specific amino acids.

Finasteride modifies 5-alpha-reductases through a two-step process, affecting inhibitor potency and possibly causing side effects.

This study utilized a UHPLC-HRMS method to identify eight active pharmaceutical ingredients, such as ketoconazole and minoxidil, in 26 out of 100 analyzed cosmetic products.

In this study, L-cysteine treated with the Trivedi Effect® showed significantly increased isotopic abundance ratios, which may enhance its stability and shelf-life.

High testosterone to epitestosterone ratio in hair could predict male-pattern baldness.

This study developed a method using UHPLC-MS/MS and MSPE to detect trace amounts of sex hormones in cosmetics, finding progestins and estrogens in some products, and performed a preliminary safety evaluation for residual progesterone in hair loss prevention cosmetics.

This study found that plasma protein binding significantly contributes to the shifts in glucocorticosteroid concentration ratios among blood, saliva, and hair, challenging prior assumptions about enzyme inactivation as the main factor.

This study found that dutasteride-loaded nanostructured lipid carriers coated with a stearic acid-chitosan oligomer are stable, less cytotoxic, and suitable for topical delivery to promote hair growth.