October 2022 in “Linköping University medical dissertations” The method shows hair testosterone levels reflect those in saliva, but are affected by various factors and may indicate a risk for heart attack.
Two finasteride tablet formulations are bioequivalent.
January 2004 in “Trace Elements Science” Diabetics have lower chromium, manganese, and copper, but higher iron in their hair.
5 citations
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August 2012 in “Anais Brasileiros de Dermatologia” Dermatologists should guide patients on blood donation timing due to various eligibility criteria.
6 citations
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January 2005 Selenosis in calves causes health issues and changes in blood parameters.
8 citations
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November 2019 in “Journal of Trace Elements in Medicine and Biology” Higher hair iron levels are linked to changes in brain structure and function.
56 citations
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January 1999 in “The Analyst” The method accurately measures certain steroids in human hair, showing different levels in males and females.
30 citations
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April 2011 in “Rapid communications in mass spectrometry/RCM. Rapid communications in mass spectrometry” Analyzing hair with this method can help understand and monitor scalp conditions and treatment effects.
December 2024 in “Turkish Society of Clinical Biochemistry” Higher BPA levels may be linked to idiopathic hyperandrogenemia in women.
2 citations
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June 2025 in “Drug Testing and Analysis” The method effectively detects MeT and TP in dried blood spots after cream application.
August 2024 in “Journal of Cosmetic Dermatology” Telogen effluvium is linked to deficiencies in iron, vitamin B12, and thyroid function.
4 citations
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December 2018 in “Macedonian Journal of Chemistry and Chemical Engineering” A new method accurately measures amino acids in treated hair, showing bleaching reduces amino acids while protein treatments increase them.
April 2023 in “World Journal of Advanced Research and Reviews” Frequent blood transfusions in beta thalassemia can lead to thyroid problems.
1 citations
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April 2021 in “Nepal journal of dermatology, venereology & leprology” Iron profile tests are recommended for women with hair loss, as haemoglobin levels alone are not reliable.
Hair test results can be misleading due to external contamination, so they shouldn't be used alone to assess long-term drug use.
10 citations
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September 2020 in “Metabolites” Hair color and length affect metabolite profiles in hair, so they should be considered in hair analysis.
8 citations
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March 2010 in “Gynecological Endocrinology” Free Testosterone Index, bioavailable testosterone, and androstenedione are the most accurate for diagnosing excess male hormones in PCOS.
February 2025 in “Clinical Cosmetic and Investigational Dermatology” Certain blood metabolites are linked to female pattern hair loss, with some increasing risk and others offering protection.
34 citations
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December 2007 in “Human Reproduction Update” In vitro bioassays are better than traditional methods for measuring androgen activity but aren't ready for routine use yet.
January 2023 in “Advances in pharmacology and clinical trials” Human hair is a significant sample for various tests in clinical, nutritional, archaeological, and forensic studies.
January 2016 in “Journal of animal research” Hair can help assess Copper and Zinc levels in dogs.
January 2012 in “Iraqi postgraduate Medical Journal” Serum ferritin is a better indicator than hemoglobin for detecting low iron in women with chronic hair loss.
research Hair
3 citations
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January 2014 in “Elsevier eBooks” Hair can reveal toxic elements and drugs in the body.
26 citations
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December 2012 in “Bioanalysis” Dried blood spots can be as stable as frozen liquid samples for storing certain metabolites.
14 citations
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February 2016 in “Journal of Obstetrics and Gynaecology Research” Blood tests are needed to confirm high male hormone levels in women with PCOS, as physical signs alone are not reliable.
September 2006 in “Data Archiving and Networked Services (DANS)” Understanding testosterone and estradiol levels is crucial for identifying normal and abnormal hormone levels in men, especially as they age.
August 2018 in “Zenodo (CERN European Organization for Nuclear Research)” New techniques can record electromagnetic fields in hair follicles for potential medical use.
7 citations
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January 2002 in “Biological Trace Element Research” Children with pituitary dwarfism have higher zinc and copper, lower manganese, and similar iron levels in hair compared to normal children.
November 2025 in “Open Access CRIS of the University of Bern” Androgen levels are more linked to body size in boys than girls.
15 citations
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July 2009 in “Biomedical Chromatography” A reliable method was developed to measure aristolochic acid-I in rat blood.