research The Role of Hair Follicles in the Percutaneous Absorption of Caffeine
Hair follicles significantly increase the speed and amount of caffeine absorbed through the skin.
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research Hair Density in African Americans
African Americans have less hair density than whites.
research In Vitro and In Vivo Study of Dye Diffusion into Human Skin and Hair Follicles
Dyes can penetrate human skin and hair follicles up to 1.2 mm deep and the sebaceous gland can store dye; Indocyanine Green lotion was made for safe dyeing and monitoring.
research Serum Ferritin and Vitamin D in Female Hair Loss: Do They Play a Role?
Low iron and vitamin D levels are linked to hair loss in women.
research Hair Cortisol Concentrations in Mental Disorders: A Systematic Review
People with depression often have higher hair cortisol levels, while those with PTSD tend to have lower levels, but more research is needed to understand this fully.
research Measurement of Hair Growth
Scalp hair grows at 0.37 mm/day, forearm hair at 0.18 mm/day, and thigh hair at 0.30 mm/day, with no significant differences found in people with certain hair conditions.
research Automated Digital Image Analysis (TrichoScan) for Human Hair Growth Analysis: Ease Versus Errors
TrichoScan often makes mistakes and needs improvement for correct hair growth analysis.
research Androgens Trigger Different Growth Responses in Genetically Identical Human Hair Follicles in Organ Culture Reflecting Their Epigenetic Diversity in Life
Male hormones cause different growth in identical human hair follicles due to their unique epigenetic characteristics.
research Acquired Pili Torti: A Structural Hair Shaft Defect in Anorexia Nervosa
Anorexia nervosa may cause a hair defect called pili torti due to malnutrition and high vitamin A levels.
research Alterations of Plasma Antioxidants and Mitochondrial DNA Mutation in Hair Follicles of Smokers
Smoking reduces antioxidants and causes DNA damage in hair follicles.