research Study on dissolution mechanism of cortisol and cortisone from hair matrix with liquid chromatography–tandem mass spectrometry
Cortisol and cortisone release from hair increases in steps over time during incubation.
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research Measurement of steroid hormones by liquid chromatography-tandem mass spectrometry with small amounts of hair
A new method accurately measures steroid hormones in a few hair strands and could help study chronic stress and hair loss.
research Determination of 19 Steroid Hormones in Human Serum and Urine Using Liquid Chromatography-Tandem Mass Spectrometry
The method accurately measures 19 steroid hormones in human blood and urine using a small sample and is suitable for large-scale monitoring.
research Gas chromatography coupled to mass spectrometry characterization, anti-inflammatory effect, wound-healing potential, and hair growth-promoting activity of Algerian Carthamus caeruleus L (Asteraceae)
Algerian Carthamus caeruleus L plant has anti-inflammatory properties, heals wounds effectively, and may help with hair growth.
research Establishing and Verifying a Robust Liquid Chromatography-Tandem Mass Spectrometry Method to Simultaneously Measure Seven Androgens Present in Plasma Samples
The method accurately measures seven androgens in plasma and shows different hormone levels in females with acne and obesity.
research Highly Sensitive Simultaneous Measurement of Steroid Hormone in Human Serum by Liquid Chromatography-electrospray Ionization Tandem Mass Spectrometry
A new method accurately measures nine steroid hormones in human serum with high sensitivity.
research Analysis of hormone antagonists in clinical and municipal wastewater by isotopic dilution liquid chromatography tandem mass spectrometry
Researchers developed a method to detect hormone-blocking drugs in wastewater and found them in Beijing's sewage, suggesting they can survive sewage treatment.
research Gas Chromatography Tandem Mass Spectrometry for Biomarkers of Alcohol Abuse in Human Hair
A new method quickly detects alcohol use from hair in under an hour.
research Studies on the persistence of estradiol benzoate and nortestosterone decanoate in hair of cattle following treatment with growth promoters, determined by ultra-high-performance liquid chromatography–tandem mass spectrometry
Detecting steroid esters in cattle hair is inconsistent and influenced by sampling factors.
research Diagnostic Thresholds for Androgen-Producing Tumors or Pathologic Hyperandrogenism in Women by Use of Total Testosterone Concentrations Measured by Liquid Chromatography-Tandem Mass Spectrometry
Total testosterone levels can help diagnose androgen-producing tumors and hyperandrogenism in women.
research Analysis of hair steroid hormone concentrations at different parts of the head by liquid chromatography-tandem mass spectrometry
Hormone levels in hair vary across the head, with the highest concentration of a key hormone linked to hair loss at the top.
research Determination of finasteride in human plasma by liquid chromatography–electrospray ionization tandem mass spectrometry with flow rate gradient
Researchers developed a quick and sensitive way to measure finasteride in blood using a small sample size.
research Apparent Hyperandrogenemia Due to Immunoassay Interference Resolved by Liquid Chromatography–Tandem Mass Spectrometry
False high testosterone levels were corrected using a more accurate test.
research Close correlation between hyperandrogenism and insulin resistance in women with polycystic ovary syndrome—Based on liquid chromatography with tandem mass spectrometry measurements
Women with PCOS who have high male hormone levels often also have insulin resistance.
research Development of a Liquid Chromatography/Mass Spectrometry-Based Inhibition Assay for the Screening of Steroid 5-α Reductase in Human and Fish Cell Lines
A new method was created to test the effectiveness of Dihydrotestosterone (DHT) inhibitors, like finasteride and dutasteride, in human and fish cells. The results showed fish cells are more sensitive to these treatments, and dutasteride works better than finasteride in all tested cells.
research An isotope dilution-liquid chromatography-tandem mass spectrometry-based candidate reference measurement procedure for the quantification of dehydroepiandrosterone sulfate in human serum and plasma
A new method accurately measures DHEAS in blood, improving on current tests.
research An isotope dilution-liquid chromatography-tandem mass spectrometry-based candidate reference measurement procedure for the quantification of 5-alpha-dihydrotestosterone in human serum and plasma
The procedure accurately measures 5-alpha-dihydrotestosterone in blood, useful for standard tests.
research Finasteride Quantification in Human Plasma by High-Performance Liquid Chromatography Coupled to Electrospray Ionization Tandem Mass Spectrometry. Application to a Comparative Pharmacokinetics Study
New method measures finasteride in plasma, finds two formulations bioequivalent.
research Ultra-Performance Liquid Chromatography with Electrospray Ionization Tandem Mass Spectrometry for the Determination of Ketoconazole in Anti-Dandruff Shampoo
The method accurately measures the amount of ketoconazole in anti-dandruff shampoo and cream, and can also be used to monitor the drug in human plasma.
research Picogram determination of finasteride in human plasma and semen by high-performance liquid chromatography with atmospheric-pressure chemical-ionization tandem mass spectrometry
Method detects finasteride in plasma and semen with high sensitivity and accuracy.
research Determination of 19 illegally added chemical ingredients in hair loss prevention cosmetics by ultra-performance liquid chromatography-quadrupole-time of flight mass spectrometry
A new method can quickly and accurately detect illegal chemicals in hair loss products.
research High resolution full scan liquid chromatography mass spectrometry comprehensive screening in sports antidoping urine analysis
The method effectively detects banned substances in urine for sports antidoping.
research Androgen Profiling by Liquid Chromatography–Tandem Mass Spectrometry (LC-MS/MS) in Healthy Normal-Weight Ovulatory and Anovulatory Late Adolescent and Young Women
The research found that anovulatory young women have higher androgen and hormone levels than those who ovulate, suggesting immature hormonal regulation rather than a specific condition.
research A high-performance liquid chromatography–tandem mass spectrometry assay of the androgenic neurosteroid 3α-androstanediol (5α-androstane-3α,17β-diol) in plasma
Testosterone increases 3α-androstanediol levels, which can be blocked by finasteride.
research Measurement of tamsulosin in human serum by liquid chromatography–tandem mass spectrometry
A reliable method was created to measure tamsulosin in human blood.
research Assessment of Circulating Sex Steroid Levels in Prepubertal and Pubertal Boys and Girls by a Novel Ultrasensitive Gas Chromatography-Tandem Mass Spectrometry Method
Prepubertal girls have higher sex steroid levels than boys, possibly leading to earlier puberty.
research Studies on neurosteroids XXIV. Determination of neuroactive androgens, androsterone and 5α‐androstane‐3α,17β‐diol, in rat brain and serum using liquid chromatography–tandem mass spectrometry
The methods accurately measured brain androgens, showing most 5α-androstane-3α,17β-diol comes from outside the brain, while androsterone is both transported and made in the brain.
research Serum Metabolomics Study of Polycystic Ovary Syndrome Based on Liquid Chromatography–Mass Spectrometry
Women with PCOS have different levels of certain fats and proteins in their blood, which could help diagnose the condition.
research Quantification of biotin in plasma samples by column switching liquid chromatography – tandem mass spectrometry
The document describes a way to measure biotin in blood to prevent wrong test results in hormone level testing.
research Simultaneous determination of seven prohibited substances in cosmetic products by liquid chromatography–tandem mass spectrometry
The method effectively identifies and measures seven banned substances in cosmetics.