research Invalidation of a commercially available human 5α-dihydrotestosterone immunoassay
The DHT immunoassay is unreliable due to high cross-reactivity with testosterone.
Search
for
Sort by
Research
30 / 1000+ resultsresearch Design and Validation of a Sensitive Multisteroid LC-MS/MS Assay for the Routine Clinical Use: One-Step Sample Preparation with Phospholipid Removal and Comparison to Immunoassays
The new LC-MS/MS method is more accurate and reliable than traditional immunoassays for measuring steroids in serum.
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 Validation of hair estradiol immuno-assays across the menstrual cycle in emerging adults
Hair samples can reliably show average long-term hormone levels in young women.
research Intricate diagnosis due to falsely elevated testosterone levels by immunoassay
Confirm testosterone levels with advanced tests to avoid unnecessary procedures.
research In vitro bioassays for androgens and their diagnostic applications
In vitro bioassays are better than traditional methods for measuring androgen activity but aren't ready for routine use yet.
research Revisiting hyper- and hypo-androgenism by tandem mass spectrometry
The document concludes that using LC-MS/MS for measuring androgens is more accurate than older methods, but it needs careful validation and standardized references to be most effective.
research Polycystic ovary syndrome and the differential diagnosis of hyperandrogenism
The document concludes that careful evaluation is needed to diagnose PCOS correctly due to similar symptoms in other conditions, and accurate testosterone level measurement is crucial.
research MANAGEMENT OF ENDOCRINE DISEASE Hyperandrogenic states in women: pitfalls in laboratory diagnosis
Diagnosing hyperandrogenism in women is complex and requires accurate testing methods and consideration of SHBG levels.
research LC-MS/MS improves screening towards 21-hydroxylase deficiency
LC-MS/MS is more reliable than immunoassays for diagnosing 21-hydroxylase deficiency.
research Unusual Presentation of Denys-Drash Syndrome in a Girl with Undisclosed Consumption of Biotin
A girl with Denys-Drash syndrome was misdiagnosed due to biotin affecting her hormone test results.
research Management of “hyperandrogenism” confounded by dermatology biotin prescriptions
Biotin can interfere with lab tests, causing misdiagnosis.
research Biotin: A friend or foe in hair loss
Biotin doesn't help hair growth in healthy people and can cause health risks if overused.
research Testosterone Analysis in Hair
The method shows hair testosterone levels reflect those in saliva, but are affected by various factors and may indicate a risk for heart attack.
research SUN-195 Falsely Elevated Testosterone Levels: Role of LC-MS/MS in Reducing Unnecessary Testing
Using LC-MS/MS for hormone measurement can prevent false high testosterone results and avoid unnecessary tests.
research Measurement of cortisol in human Hair as a biomarker of systemic exposure
Hair cortisol can be used to measure long-term stress exposure.
research Determining the normal cut-off levels for hyperandrogenemia in Chinese women of reproductive age
Normal levels for certain hormones in Chinese women of reproductive age were identified.
research Determination of estradiol and progesterone concentrations in human scalp hair
Hair levels of estradiol and progesterone are higher in premenopausal than postmenopausal women, but the difference isn't statistically significant, indicating the need for a better measurement method.
research First Case of Degenerative Mucinotic Mural Folliculitis in Brazil
A cat in Brazil was found with a severe skin condition linked to feline AIDS.
research Diagnosis of hyperandrogenism: Biochemical criteria
The document concludes that accurate measurement of serum androgens is crucial for diagnosing hyperandrogenism.
research Synthesis of 11α-hydroxyprogesterone hartens
Researchers successfully made new compounds for hormone level tests, but one attempt led to an unexpected product, correcting a past error.
research Biotin beware: Perils of biotin supplementation: Response to: “The epidemiology, impact, and diagnosis of micronutrient nutritional dermatoses. Part 2: B-complex vitamins”
Taking biotin supplements can be risky and often lacks evidence of effectiveness for skin, hair, and nail issues.
research Extraction and Analysis of Cortisol from Human and Monkey Hair
Hair cortisol analysis effectively measures long-term stress.
research Extraction and Analysis of Cortisol from Human and Monkey Hair
The method effectively measures long-term stress levels using hair samples.
research Association Between Stress and Bilateral Symmetrical Alopecia in Free-Ranging Formosan Macaques (Macaca Cyclopis) in A High-Population-Density Area
Stress likely causes hair loss in Formosan macaques.
research An evaluation of distal hair cortisol concentrations collected at delivery
Distal hair cortisol is not a reliable measure of early pregnancy cortisol levels.
research The quantification of reproductive hormones in the hair of captive adult brown bears and their application as indicators of sex and reproductive state
Measuring reproductive hormones in brown bear hair could help identify their sex and reproductive state, but better collection methods or lab techniques are needed.
research Antimüllerian hormone to determine polycystic ovarian morphology
A blood test level of 3.2 ng/mL of Antimüllerian hormone is good for identifying polycystic ovarian morphology in European women aged 25–45.
research How Biotin Induces Misleading Results in Thyroid Bioassays: Case Series
Taking biotin supplements can cause incorrect thyroid test results, leading to wrong diagnoses.
research Ultrastructural alterations and environmental exposure influence the opiate concentrations in hair of drug addicts
Environmental factors can greatly reduce drug levels in hair.