research Human hair follicles display a functional equivalent of the hypothalamic‐pituitary‐adrenal (HPA) axis and synthesize cortisol
Human hair follicles can produce cortisol like the body's stress response system.
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90-120 / 1000+ resultsresearch On the etiology of vitiligo and gray hair
Melanocytes are destroyed by factors needed for melanin production, causing vitiligo and gray hair.
research Towards a “free radical theory of graying”: melanocyte apoptosis in the aging human hair follicle is an indicator of oxidative stress induced tissue damage
Oxidative stress causes hair to gray by damaging and killing pigment cells.
research Temporary hair removal by low fluence photoepilation: Histological study on biopsies and cultured human hair follicles
Low fluence photoepilation temporarily removes hair by targeting the hair follicle's pigmented area without severe damage.
research Methods in hair research: how to objectively distinguish between anagen and catagen in human hair follicle organ culture
A reliable system was developed to distinguish hair growth stages, aiding in identifying hair growth promoters or inhibitors.
research Genome-wide association meta-analysis of individuals of European ancestry identifies new loci explaining a substantial fraction of hair color variation and heritability
New genetic locations explain much of hair color variation in Europeans.
research Aging of the hair follicle pigmentation system
Hair grays due to oxidative stress and fewer functioning melanocytes.
research Graying of Hair Produced by Ingestion of Phenylthiocarbamide
Eating phenylthiocarbamide made all the rats' hair go gray, but some returned to their original color after stopping.
research Topical Application of a Protein Kinase C Inhibitor Reduces Skin and Hair Pigmentation
Applying a specific inhibitor lightens skin and hair color.
research Influence of Pigmentation on the Codeine Content of Hair Fibers in Guinea Pigs
Darker hair in guinea pigs holds more codeine than lighter hair.
research Effect of Adenovirus-Mediated Expression of Sonic Hedgehog Gene on Hair Regrowth in Mice With Chemotherapy-Induced Alopecia
Using a gene therapy with the Sonic Hedgehog gene helps mice regrow hair faster after losing it from chemotherapy.
research Age-related hair changes in men: Mechanisms and management of alopecia and graying
Men's hair loss is caused by hormones and genes, and can be treated with medication and surgery, while graying is due to aging and has no prevention except dyeing.
research Hair Follicular Expression and Function of Group X Secreted Phospholipase A2 in Mouse Skin
sPLA2-X is crucial for normal hair growth and follicle health.
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.
research Dermal Adipose Tissue Secretes HGF to Promote Human Hair Growth and Pigmentation
Fat under the skin releases HGF which helps hair grow and gain color.
research Re-Evaluating Cyclosporine A as a Hair Growth–Promoting Agent in Human Scalp Hair Follicles
Cyclosporine A promotes hair growth and prolongs the active growth phase in human hair follicles, but may work differently than in rodents.
research Photochemical alterations in human hair. I. Artificial irradiation and investigations of hair proteins
Melanin in black hair protects it from sun damage better than light-brown hair.
research Dyeing regions of oxidative hair dyes in human hair investigated by nanoscale secondary ion mass spectrometry
Hair dye colors mainly target melanin granules in black hair.
research UV damage of the hair.
Excessive sun exposure damages hair, causing protein loss and color changes.
research Age-Related Hair Pigment Loss
Graying hair happens due to aging and might be delayed by new treatments.
research Dopamine is a novel, direct inducer of catagen in human scalp hair folliclesin vitro
Dopamine stops hair growth and pigment production in human scalp hair follicles.
research Photoageing of Hair Fiber and Photoprotection
Sunlight damages hair, causing cuticle loss, protein changes, and discoloration.
research Modulation of Chemotherapy-Induced Human Hair Follicle Damage by 17-β Estradiol and Prednisolone: Potential Stimulators of Normal Hair Regrowth by “Dystrophic Catagen” Promotion?
17-β estradiol and prednisolone may speed up hair regrowth after chemotherapy.
research Human Hair as a Natural Sun Protection Agent: A Quantitative Study
Hair acts as a significant natural sun barrier, with protection increasing based on hair density, thickness, and melanin presence.
research Evaluation of wavelength-dependent hair growth effects on low-level laser therapy: an experimental animal study
The 830-nm wavelength was most effective at promoting hair growth in rats using low-level laser therapy.
research The nutritional biochemistry of wool and hair follicles
Nutrients like vitamins, copper, zinc, and amino acids are crucial for healthy hair and wool growth.
research 3,4,5-Tri-O-Caffeoylquinic Acid Promoted Hair Pigmentation Through β-Catenin and Its Target Genes
A substance called TCQA could potentially darken hair by activating certain genes and increasing melanin.
research mTORC1 activity negatively regulates human hair follicle growth and pigmentation
High mTORC1 activity slows hair growth and causes it to lose color.
research Therapeutics of premature hair graying: A long journey ahead
Effective treatments for premature hair graying still require significant research.
research Efficacy of an agonist ofα-MSH, the palmitoyl tetrapeptide-20, in hair pigmentation
Palmitoyl tetrapeptide-20 may help reduce hair greying and increase melanin production.