research Tryptophan in Human Hair: Correlation with Pigmentation
Men have more tryptophan in their hair than women, and it increases with age and is higher in darker and grey or white hair.
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research Biomolecules of Fermented Tropical Fruits and Fermenting Microbes as Regulators of Human Hair Loss, Hair Quality, and Scalp Microbiota
Fermented papaya and mangosteen in hair care products helped prevent hair loss and improve hair thickness.
research Melatonin Promotes Hair Regeneration by Modulating the Wnt/β-Catenin Signaling Pathway
Melatonin helps hair grow by activating a specific signaling pathway.
research Adipose-Derived Stem Cell Exosomes Antagonize the Inhibitory Effect of Dihydrotestosterone on Hair Follicle Growth by Activating Wnt/Beta-Catenin Pathway
Substances from fat-derived stem cells can promote hair growth and counteract hormone-related hair loss by activating a key hair growth pathway.
research Insights on the Mechanical Behavior of Keratin Fibrils
Keratin's mechanical properties are influenced by hydrogen bonds and secondary structure, and can be improved with the SPD-2 peptide.
research Lamellar Ichthyosis with Pseudoexon Activation in the Transglutaminase 1 Gene
The boy's severe skin disorder is caused by two new mutations in his TGM1 gene.
research Analysis of Gene Expression in Isolated Single Hair Follicles Using Semiquantitative Reverse-Transcriptase Polymerase Chain Reaction
Researchers developed a new way to measure gene activity in single hair follicles and found that a specific gene's activity changes with different amounts and times of treatment.
research Development of an Improved Method to Estimate the Days of Continuous Drug Ingestion Based on Micro-Segmental Hair Analysis
Researchers improved a method to more accurately estimate when and how long a drug was taken using hair analysis.
research Validity of Methyl Mercury Hair Analysis: Mercury Monitoring in Human Scalp/Nude Mouse Model
Human scalp hair on mice can effectively monitor mercury exposure.
research Efficacy of Topical Finasteride 0.5% vs 17α-Estradiol 0.05% in the Treatment of Postmenopausal Female Pattern Hair Loss: A Retrospective, Single-Blind Study of 119 Patients
Topical finasteride works faster and better than 17α-estradiol for postmenopausal hair loss.
research A Prospective Cross-Sectional Study on Post COVID-19 Hair Loss at a Tertiary Care Hospital
Many patients experienced severe hair loss after COVID-19, especially older adults and women.
research Unusual Patterns of Presentation of Frontal Fibrosing Alopecia: A Clinical and Trichoscopic Analysis of 98 Patients
Trichoscopy helps diagnose frontal fibrosing alopecia, even with unusual patterns.
research Hair Versus Nails: Is There a Place for Other Keratin Matrices?
Nails are a useful alternative to hair for analyzing long-term substance exposure.
research Dermoscopy of Hair and Scalp Disorders (Trichoscopy) in Skin of Color—A Systematic Review by the International Dermoscopy Society Imaging in Skin of Color Task Force
More research is needed to understand hair and scalp disorders in people with skin of color.
research Tacrolimus Monitoring in Hair Samples of Kidney Transplant Recipients
Hair samples can reliably monitor tacrolimus levels in kidney transplant patients.
research Reporting Live from the Epidermal Stem Cell Compartment
The study showed that some hair follicle stem cells wake up to grow hair while others stay asleep, and that the environment around them is important for hair growth.
research UPLC-MS/MS Method for the Simultaneous Quantification of Caffeine and Illicit Psychoactive Drugs in Hair Using a Single-Step High-Speed Grinding Extraction – Insights into a Cut-Off Value for Caffeine Abuse
The conclusion is that a new method can measure caffeine and drugs in hair, finding caffeine abusers have 70 times more caffeine than normal, with a proposed cut-off value for abuse.
research Critical Study of Hair Growth Analysis with Computer-Assisted Methods
The Trichoscan system was found to be inaccurate for measuring hair growth, needing better software to be useful.
research Investigation and Analysis of 1030 Primary Hair Transplantation Cases: A Retrospective Study
The study found that hair transplant complications are rare, with swelling being the most common issue.
research Segmental Hair Analysis as a Retrospective Testosterone Diary: Possibilities and Pitfalls
Segmental hair analysis can track testosterone over time but needs adjustments for sex, hair color, and washing frequency.
research Single Follicular Unit Transplantation Reconstructs Arrector Pili Muscle and Nerve Connections and Restores Functional Hair Follicle Piloerection
Hair transplant surgery can rebuild muscle and nerve connections, allowing transplanted hairs to stand up like normal hairs.
research Structural Analysis of Human Hair Fibers Under the Ultra-High Voltage Electron Microscope
Human hair structure varies by ethnicity, and certain treatments can improve hair condition and appearance.
research Characterization of X-Linked Hypohidrotic Ectodermal Dysplasia Hair and Sweat Gland Phenotypes Using Phototrichogram Analysis and Live Confocal Imaging
People with X-linked hypohidrotic ectodermal dysplasia have no sweat ducts and less, thinner hair.
research Peer Review of Human Hair Shaft Proteomic Profiling: Individual Differences, Site Specificity, and Cuticle Analysis
The research found that people's hair proteins vary, especially by ethnicity and body part, which could help identify individuals in forensic science.
research Human Hair Shaft Proteomic Profiling: Individual Differences, Site Specificity, and Cuticle Analysis
The research found that people's hair proteins vary by individual and body part, with some differences between ethnic groups, which could help in forensics.
research Analysis of Structural Changes in Permanent Waved Human Hair Using Raman Spectroscopy
Permanent waving weakens hair by altering its protein structure.
research Perspectives and Challenges of Hair Analysis
Hair is a complex organ, and understanding its detailed structure and growth phases is crucial for analyzing substances within it.
research Hair Shaft Abnormalities: Pili Bifurcati - A Scanning Electron Microscopy Analysis
The study found that pili bifurcati causes hair to intermittently split into two branches, each with its own outer layer.
research Different Localizations of Drugs Simultaneously Administered in a Strand of Hair by Micro-Segmental Analysis
Drugs localize differently in hair strands based on their properties.
research Mutant Laboratory Mice With Abnormalities in Hair Follicle Morphogenesis, Cycling, and Structure: An Update
The document concludes that mouse models are crucial for studying hair biology and that all mutant mice may have hair growth abnormalities that require detailed analysis to identify.