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Sheep wool follicles absorb different amino acids at various rates and locations, which could affect wool growth based on diet and genetics.

The nucleus is key in controlling skin growth and repair by coordinating signals, gene regulators, and epigenetic changes.

The hair cuticle is made of tough proteins that protect the hair, but more research is needed to fully understand its structure.

Future hair cosmetics will be safer and more effective.

KCNQ potassium channels help control the sensitivity of touch receptors in the skin.

Polydopamine is a safe, effective, and permanent hair dye that turns gray hair black in one hour.

Plant extracts may help prevent or reverse hair graying.

Hair matrix cysts are rare skin nodules with unique features, often needing surgical removal.

Alopecia Areata causes significant structural and compositional changes in hair.

Autologous fat transfer improves hair growth in scarring alopecia and allows for denser hair transplants.

Astressin-B can reverse and prevent hair loss in stressed mice.

Low levels of vitamin B12 and ferritin are linked to early hair graying.

Trichoscopy helps diagnose and monitor hair and scalp problems without needing many biopsies.

Collagen XVII is crucial for skin cell growth and nail health.

The article concludes that developing in vitro models for human hair structures is important for research and reducing animal testing, but there are challenges like obtaining suitable samples and the models' limitations.

Human nails and hair follicles have similar gene activity, especially in the cells that contribute to their growth and development.

Hair transplantation effectively treats scalp scars with high success and patient satisfaction.

In 2011, hair restoration was a specialized field in plastic surgery, using techniques like "Ultrarefined follicular unit hair transplantation" to minimize scarring and promote hair growth, with future treatments like stem cell therapy and hair cloning still being tested.

Touching hair can activate nearby nerve cells through signals from the hair's outer layer.

Hair growth and health are influenced by stress and hormones.

Pigmented casts are common in several hair loss conditions and can help diagnose specific types of alopecia.

Microneedling combined with other treatments significantly improves hair growth in people with hair loss and is safe.

Understanding how androgens and their receptors work can lead to improved treatments for skin diseases.

Regenerated fully functional hair follicles using stem cells, with potential for hair regrowth therapy.

Wnt1a-conditioned medium from stem cells helps activate cells important for hair growth and can promote hair regrowth.

Hair follicles could be used to deliver drugs effectively, with the right understanding and methods.

Activating NRF2 might help treat hair disorders by improving antioxidant defenses.

Hair follicles could be used for targeted drug delivery, with liposomal systems showing promise for this method.

Growth factors and cytokines are important for hair growth and could potentially treat hair loss, but more research is needed to overcome challenges before they can be used in treatments.

A substance called compound-1 could help increase hair growth by maintaining prostaglandin levels in hair follicles.