research Quantifying variation in human scalp hair fiber shape and pigmentation
African hair is curled, Asian hair is thick, European hair is lighter, and chemical methods help identify hair color differences.
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research The Genomic Variation in Textured Hair: Implications in Developing a Holistic Hair Care Routine
Afro-textured hair needs personalized care due to its unique genetic traits.
research Seasonal variation in hair follicle activity and fibre growth of both male and female Merghoz goats in Western Iran
Goat hair growth and follicle activity change with the seasons and differ between males and females.
research Electrophoretic variation of hair proteins.
Most people have similar hair protein patterns, but a rare variant was found in two women.
research Investigating the origins of nanostructural variations in differential ethnic hair types using X‐ray scattering techniques
Different ethnic hair types have unique nanoscopic and molecular features despite having the same basic keratin structure.
research Spatial variation and associated genes of total hair follicle density in goats
Four genes affect hair follicle density in goats.
research Gender variation of Vit. D levels in Hair and Serum
Vitamin D levels in hair and serum are similar for males and females.
research Radiolabel validation of cortisol in the hair of rhesus monkeys
Hair cortisol can indicate long-term stress levels, but hair growth rate differences may affect accuracy.
research The validation of estradiol extraction and analysis from hair
Hair can reliably measure average estradiol levels over months in humans and monkeys.
research Variation in human hair ultrastructure among three biogeographic populations
Different populations have distinct hair structures related to their ancestry.
research Variations of scalp, pubic and axillary hair
Pubic hair is thicker than axillary and scalp hair, useful for forensic identification.
research Hair Diameter Variation in Different Vertical Regions of the Occipital Safe Donor Area
Hair thickness decreases from the upper to lower areas of the back of the head, affecting hair transplant results.
research Sequencing KRT71 as a candidate gene for hair shape variation in dromedary camels
KRT71 gene variants may influence camel hair shape but don't fully explain it.
research Variations of Hair Follicle Size and Distribution in Different Body Sites
Hair follicle size and distribution vary significantly across different body sites.
research Towards the validation of endogenous steroid testing in wildlife hair
Hair analysis for stress and reproductive hormones in wildlife needs more research for accuracy across species.
research Sources of variation in hair cortisol in wild and captive non-human primates
Hair cortisol levels in primates are useful for stress assessment but vary by age, sex, species, and hair collection methods.
research Variation of Hair Follicle Counts among Different Scalp Areas: A Quantitative Histopathological Study
Hair count values should be standardized for each scalp region to evaluate hair disorders in Asians.
research Variation in Muskox (Ovibos moschatus) Guard Hair Growth Rates: Implications for Measuring Chronological Biomarkers
Muskox hair growth rates vary widely, so a single growth rate can't be used for all populations.
research Parity-related variation in cortisol concentrations in hair during pregnancy and in the postpartum period: a prospective cohort study
First-time mothers had higher stress hormone levels in late pregnancy than mothers who had given birth before.
research Validation of TrichoScan® technology as a fully-automated tool for evaluation of hair growth parameters
TrichoScan® is a reliable tool for measuring hair growth, providing quicker and more consistent results than manual methods.
research Variation and Heritability in Hair Diameter and Curvature in an Australian Twin Sample
Hair diameter and curvature are mostly determined by genetics.
research The Genomic Variation in Textured Hair: Implications in Developing a Holistic Hair Care Routine
Afro-textured hair needs specialized care due to its unique genetic and structural properties.
research HPA Axis Variation and ACEs; Childhood Sexual Trauma is Associated with Lower Hair Cortisol in Adulthood
Childhood sexual trauma, especially between ages 5-7, is linked to lower cortisol levels in adult hair, suggesting long-term stress response changes.
research Standardization and Validation of Scalp Surface Area Measurement and Assessment of Interchangeability Between Two Independent Methodologies for Head Crown Area and Total Hair Count Measurement
Two methods reliably measure scalp area and hair count.
research Personalized Hair Care Leveraging Genomic Variation for Optimal Hair Health
Tailored treatments based on genetics improve hair health.
research Variation in male sex hormone levels among the pattern subtypes of hair loss in patients with androgenetic alopecia
Different hair loss patterns may be linked to varying male hormone levels.
research Validation of hair estradiol immuno-assays across the menstrual cycle in emerging adults
Hair samples can reliably show average long-term hormone levels in young women.
research Validation and Reference Ranges of Hair Cortisol Measurement in Healthy Children
Hair cortisol levels in children increase with age but are not affected by gender, puberty, or hair care.
research Synthesis and Validation of Functional Nanogels as pH-Sensors in the Hair Follicle
Scientists created tiny pH-sensing gels that can safely measure the pH levels inside hair follicles.
research Validation of scalp coverage scoring methods for scalp hair loss in male pattern hair loss (androgenetic alopecia)
Scalp coverage scoring accurately measures hair loss and treatment effectiveness.