research The lack of significant changes in scalp hair follicle density with advancing age
Aging alone barely affects the number of hair follicles, meaning hair loss is minimal without other conditions like androgenetic alopecia.
Search
for
Sort by
Research
120-150 / 1000+ results 
research Real-time in vivo structure-function study of scalp hair cycles: an experimental approach for monitoring living hair roots with a 20-year follow-up
Minoxidil and finasteride effectively promote hair regrowth within 3 months.
research Dose-Dependent Histopathological and Structural Impact of Chemical Hair-Straighteners on Scalp Epithelium and Hair-Fibres Using Albino Wistar Rats
Chemical hair straighteners can severely damage hair and scalp with repeated use.
research Hedgehog signaling maintains hair follicle stem cell phenotype in young and aged human skin
Hedgehog signaling helps keep hair follicle stem cells the same in both young and old human skin.
research Penetration and Distribution in Human Skin Focusing on the Hair Follicle
Targeting drugs to hair follicles can treat skin conditions, but reaching deep follicle areas is hard and needs more research.
research Air Wedge Interferometry for Microscopic Thickness Measurement of Human Hair
Air wedge interferometry is a precise, cost-effective way to measure hair thickness.
research POLEVAN®—A Multifunctional Natural Hair Ingredient, as Determined by In-Vitro and Human Studies
POLEVAN® improves hair shine, moisturizes the scalp, and maintains foam quality in shampoos.
research Peer Review #2 of "Human hair shaft proteomic profiling: individual differences, site specificity and cuticle analysis (v0.1)"
The research found that people's hair proteins vary, especially by ethnicity and body part, which could help identify individuals in forensic science.
research Peer Review #1 of "Human hair shaft proteomic profiling: individual differences, site specificity and cuticle analysis (v0.1)"
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 Acidic and basic hair/nail ("hard") keratins: their colocalization in upper cortical and cuticle cells of the human hair follicle and their relationship to "soft" keratins.
Hair and nail cells share similar proteins, indicating a common differentiation pathway.
research Penetration and distribution of three lipophilic probes in vitro in human skin focusing on the hair follicle
Medium lipophilic substances penetrate skin best, and adding ethanol can increase delivery to hair follicles.
research Mechanisms of impairment in hair and scalp induced by hair dyeing and perming and potential interventions
Hair dyes and perms can damage hair and scalp, but using interventions can reduce harm.
research Effect of Surface Treatments on the Nanomechanical Properties of Human Hair
Bleaching and combing damage hair's surface and mechanical properties.
research Structural investigation on damaged hair keratin treated with α,β-unsaturated Michael acceptors used as repairing agents
Treatments improved hair surface and scale structure but didn't increase certain bonds in the hair cortex.
research Phenotypic modulation of human hair matrix cells (trichocytes) by environmental influence in vitro and in vivo.
Human hair cells can change based on their environment, especially interactions with certain skin cells.
research Optimal processing for proteomic genotyping of single human hairs
The method improved hair analysis for better forensic identification.
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 Biomechanics of chemically treated hair for continuous 1D strands
NaOH treatment improves hair strength and suitability for textiles.
research 698 Effect of lithocholic acid as a ligand of vitamin D receptor on hair growth in alopecia
Lithocholic acid helps hair growth and regeneration in alopecia by activating vitamin D receptors.
research New aspects of the structure of human hair on the basis of optical microscopic observations of disassembled hair parts.
Human hair's strength comes from a honeycomb-like structure and macrofibrils.
research Human Female Hair Follicles Are a Direct, Nonclassical Target for Thyroid-Stimulating Hormone
Thyroid-stimulating hormone affects hair follicles but doesn't change hair growth or color.
research Niacinamide Down-Regulates the Expression of DKK-1 and Protects Cells from Oxidative Stress in Cultured Human Dermal Papilla Cells
Vitamin B3 may help prevent hair loss and promote hair growth by protecting scalp cells from stress and reducing hair growth-blocking proteins.
research A Meeting of Two Chronobiological Systems: Circadian Proteins Period1 and BMAL1 Modulate the Human Hair Cycle Clock
BMAL1 and Period1 genes can influence human hair growth.
research Sex steroid synthesis in human skin in situ: The roles of aromatase and steroidogenic acute regulatory protein in the homeostasis of human skin
Human skin produces sex hormones like estrogen and testosterone, influenced by ARO and StAR, which may affect skin elasticity and hair growth.
research Primary scalp alopecia: new histopathological tools, new concepts and a practical guide to diagnosis
The document concludes that new methods improve the accuracy of diagnosing scalp alopecia and challenges the old way of classifying it.
research Effect of 5α-Dihydrotestosterone and Testosterone on Apoptosis in Human Dermal Papilla Cells
High levels of testosterone and 5α-DHT can lead to cell death in cells important for hair growth.
research HAIR | Overview
The document explains how hair is studied in forensics to identify its source and its role in criminal investigations.
research Peer Review #3 of "Nature-derived lignan compound VB-1 exerts hair growth-promoting effects by augmenting Wnt/β-catenin signaling in human dermal papilla cells (v0.1)"
The natural compound VB-1, found in a Chinese herb, can promote hair growth by boosting cell activity in human skin cells.
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 Characterization of Human KAP24.1, A Cuticular Hair Keratin-Associated Protein with Unusual Amino-Acid Composition and Repeat Structure
Scientists discovered a unique hair protein, KAP24.1, with a special structure, found only in the upper part of hair cuticles.