research Hair greying is associated with active hair growth
White hair grows thicker and faster than black hair due to higher activity of growth-related genes and proteins.
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540-570 / 1000+ results research Segmental Hair Analysis for 11-Nor- 9-Tetrahydrocannabinol-9-Carboxylic Acid and the Patterns of Cannabis Use
THCCOOH levels in hair decrease from root to tip and don't match well with self-reported cannabis use.
research The Cross-section Trichometer: A New Device for Measuring Hair Quantity, Hair Loss, and Hair Growth
The Cross-section Trichometer is a new tool that can measure hair quantity and detect hair loss and growth.
research Polarization Microscopy of Hair in Acrodermatitis Enteropathica
Zinc therapy improved hair health in a girl with acrodermatitis enteropathica.
research Influence of thermal hair straightening on cannabis and cocaine content in hair
Thermal hair straightening changes drug levels in hair, affecting test results.
research Analysis of Hair Cortisol as an Indicator of Chronic Stress in Pigs in Two Different Farrowing Systems
Pigs in farrowing crates and loose-housing systems showed no difference in chronic stress levels as measured by hair cortisol.
research Estimation of zinc and iron levels in the serum and hair of women with androgenetic alopecia: Case–control study
Women with androgenetic alopecia have lower zinc and iron levels.
research Correlation of Hair Mineral Concentrations with Insulin Resistance in Korean Males
Higher hair calcium to magnesium ratios and lower chromium levels in hair may indicate insulin resistance in Korean men.
research Development of a new GC–MS/MS method for the determination of metformin in human hair
A new method was created to measure metformin in hair, showing potential for monitoring treatment and medical investigations.
research Increased Polyamine Concentrations in the Hair of Cancer Patients
Hair can be used to measure cancer-related chemicals noninvasively.
research Experimental Investigations on Hair Fibers as Diffusion Bridges and Opiates as Solutes in Solution
Hair can absorb and transfer opiates when soaked in water, with damaged hair absorbing more.
research Single-cell transcriptomics reveals lineage trajectory of human scalp hair follicle and informs mechanisms of hair graying
The study found new details about human hair growth and suggests that preventing a specific biological pathway could potentially treat hair graying.
research Measurement of steroid hormones by liquid chromatography-tandem mass spectrometry with small amounts of hair
A new method accurately measures steroid hormones in a few hair strands and could help study chronic stress and hair loss.
research Temporary Relocation during Rest Periods: Relocation Stress and Other Factors Influence Hair Cortisol Concentrations in Horses
Moving horses to new places can increase their stress levels, as shown by higher stress hormone in their hair.
research Use of hair cortisol as a biomarker for chronic stress in pregnancy
Hair cortisol could be a marker for chronic stress in pregnancy, but depression affects cortisol levels differently.
research Analyzing the laser‐light reflection from human hair fibers. II. Deriving a measure of hair luster
The conclusion is that a new method to measure hair shine was confirmed to match people's visual assessments.
research Unique Hair Properties that Emerge from Combinations of Multiple Races
Mixed-race individuals have hair with varied shapes and more root damage.
research Automated analysis of scanning electron microscopic images for assessment of hair surface damage
A new automated method accurately measures hair damage using microscopic images.
research Hair Steroid Profiling Reveals Racial Differences in Male Pattern Baldness between Korean and Caucasian Populations
Korean and Caucasian men with male pattern baldness have different hair steroid levels.
research Two-dimensional electrophoretic analysis of human hair keratins, especially hair matrix proteins
The method effectively analyzes human hair proteins, especially nonfilamentous ones.
research Human Hair Outer Root Sheath Cells and Platelet-Lysis Exosomes Promote Hair Inductivity of Dermal Papilla Cell
HHORSC exosomes and PL improve hair growth treatment outcomes.
research Examination of the Elemental Composition of Hair in Cholelithiasis, Kidney Stone, Hypertension and Diabetes by Scanning Electron Microscopy and Energy Dispersive Spectrometry SEM/EDS
The study did not conclude whether hair can reliably indicate kidney stones, cholelithiasis, hypertension, or diabetes.
research Caffeine content in newborn hair correlates with maternal dietary intake
Newborns' hair shows how much caffeine their mothers drank during pregnancy.
research Scanning Electron Microscopy Approach for Evaluation of Hair Dyed with Lawsonia inermis Powder: in vitro Study
Henna dye improves hair cuticle and thickness but effects vary by hair type and health.
research Protective effect of conditioner agents on hair treated with oxidative hair dye
Conditioners in hair dye reduce damage and improve combability.
research Influence of Chemical Straightening on the Stability of Drugs of Abuse in Hair
Chemical hair straightening significantly reduces detectable drug levels in hair.
research Kinetics and Equilibrium of Solute Diffusion into Human Hair
Hair absorbs molecules differently based on their size, charge, and love for water, and less at higher pH; this can help make better hair products.
research Glycation of hair protein in the assessment of long-term control of blood glucose.
Hair glycation levels can indicate long-term blood sugar control.
research Relationships Between Hair Chemical Elements and Nutritional Status in Oldest-Old and Centenarian Populations
Hair selenium levels can indicate nutritional status in very old people.
research Effects of ultraviolet B radiation on physicochemical properties of human hair shaft
UVB radiation changes the chemical makeup and dries out human hair but doesn't alter its appearance or texture.