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Hair ages due to genetics and environmental factors, leading to graying and thinning, with treatments available for some conditions.

Genetically modified sheep with more β-catenin grew more wool without changing the wool's length or thickness.

Gender affects hair and scalp characteristics, with differences in hormone responses, graying patterns, and trace metals.

β-catenin in the dermal papilla is crucial for normal hair growth and repair.

Dieckol from Ecklonia cava may help hair growth and could be a potential hair loss treatment.

Trichoscopy is useful for correctly diagnosing tinea capitis in adults with unexplained hair loss.

Hair transplantation in East Asians needs special techniques to ensure natural results and prevent complications due to their unique hair and scalp characteristics.

Using minoxidil and tretinoin on the skin, along with oral vitamin D, improved hair thickness and density in two girls with woolly hair.

Modern hair transplants use small grafts for a natural look and drugs to prevent further loss, with high patient satisfaction.

Disrupted sleep patterns can harm skin and hair cell renewal, but melatonin might help.

Hair restoration surgery has improved to transplant hair in natural groupings, but it's labor-intensive and can't fully restore normal hair density.

All-trans retinoic acid causes hair loss by increasing TGF-β2 in hair follicle cells.

Dexamethasone affects hair growth by altering levels of proteins that either promote or inhibit hair follicle growth.

Tet1/2/3 enzymes affect hair follicle cell development by influencing BMP signaling.

Polygonum multiflorum extract helps grow hair by activating certain hair growth signals in mice.

The research provides specific measurements for hair follicles that can improve hair transplant and regeneration techniques.

Hair dyes can change hair color temporarily or permanently but may cause side effects like skin reactions and hair damage.

Stem cell therapy is a promising approach for hair regrowth despite potential side effects.

Annurca apple extract promotes hair growth by changing hair follicle metabolism to boost keratin production.

Researchers developed a way to study human body clocks using hair tissue, which works similarly in both healthy and dementia patients.

Short Anagen Syndrome causes persistently short hair and increased shedding, usually improving after puberty.

Tetrahydroxystilbene Glucoside may help prevent hair loss by blocking certain pathways that lead to cell death.

Angora goat hair grows faster and produces more protein than cashmere goat hair, and certain hormones and nutrients positively affect hair growth and protein synthesis.

Keratin extract from human hair was found to promote hair growth in mice.

The phototrichogram is better for measuring hair thickness.

The PTGER2 gene is highly active in Cashmere goat skin and its activity changes with the hair growth cycle.

Stopping S100A3 activity slows down hair growth in mice.

Rex rabbits should not be slaughtered before 120 days for the best fur quality.

Exosomes from stem cells help hair regrowth by activating a specific signaling pathway.

Scientists created a lab-grown hair follicle model that behaves like real hair and could improve hair loss treatment research.