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Early and late matrix progenitors in hair follicles create different cell layers, with early ones forming the companion layer and later ones forming the inner root sheath and hair shaft.

Telocytes have potential in therapy and tissue regeneration, but challenges in identification and cultivation remain.

Hair loss is caused by mechanical, thermal, and metabolic stress, not just hormones.

About 21.3% of young, healthy Chinese men experience hair loss. Hairlines are mostly linear or have a central protrusion. Hair is densest on the top and back of the head, and hair follicles usually have 1 or 2 hairs. This information can help in designing hair restoration procedures.

People with pattern hair loss have higher polyamine levels in the top of their head compared to the back.

Betamethasone activates and increases the growth of certain skin cells from hair follicles.

Strontium and cerium are most effective for tissue repair.

Sebaceous glands can form new hair follicles when activated, but hair follicle bulges cannot.

Hair count values should be standardized for each scalp region to evaluate hair disorders in Asians.

C-tactile nerves are sensitive to hair movement.

Corneal regeneration relies on distinct stem cell compartments in the limbal niche.

Mammal hairs have different internal structures.

Increased hair growth after a cast is temporary and harmless.

Tissue-resident memory T cells can protect against infections and cancer but may also contribute to autoimmune diseases.

Scarring alopecia affects different hair follicle stem cells than nonscarring alopecia, and the infundibular region could be a new treatment target.

Trichilemmoma, BCC, and SCC tumors have different stem cell marker expressions.

CK15 is not a reliable marker for stem cells in damaged hair follicles from patients with CCCA.

BMPs are important for hair growth and can counteract the negative effects of androgens on hair follicle stem cells.

Trichoscopy effectively detects early hair follicle changes before visible baldness in men under 40.

Micro-CT helps identify suitable areas for surgical procedures based on blood vessel distribution in hypospadias-affected rats.

CaV1.2 helps activate hair follicle stem cells without calcium flux.

Mummy hair from the Taklamakan desert has calcium and phosphorus inside.

Mutations in iRhom2 affect hair and skin in mice and are linked to esophageal cancer, with ADAM17 playing a crucial role.

Baricitinib may reactivate trichilemmal cysts in people with a history of these cysts.

Adults with alopecia areata often have empty follicular openings, while children show more honeycomb pigment patterns.

Regional nerve blocks are better than ring blocks for pain relief during PRP hair treatment.