40 citations
,
June 2009 in “Journal of Cutaneous Pathology” AGA patients have fewer hairs and smaller follicles; T:V ratio above 4:1 may indicate AGA.
February 2023 in “American Journal of Biomedical and Life Sciences” Hair analysis can effectively assess nutritional status.
2 citations
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January 2017 Hair movement can indicate hair quality and health.
December 2025 in “BMC Medical Genomics” Hair follicles can be used to study gene expression and understand conditions like COPD.
38 citations
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October 2011 in “Analytical biochemistry” Hair proteins have weak spots in their α-helical segments.
234 citations
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November 2009 in “American journal of human genetics” Common variants in the Trichohyalin gene are linked to straight hair in Europeans.
September 2001 in “Emergency Medicine News” Hair testing is effective for detecting long-term drug use.
Trichopigmentation is a non-invasive, reversible treatment for hair loss that offers natural-looking results for both men and women.
3 citations
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November 1999 in “Journal of Cutaneous Medicine and Surgery” Examining scalp biopsies in different ways helps better diagnose hair loss types.
Hair cortisol content can indicate cortisol exposure and varies with age, puberty, and BMI in youth.