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Low testosterone and 5α-reductase inhibitors can harm men's metabolic and sexual health; testosterone therapy may help, but discussing 5α-RIs' side effects is important.

Finasteride irreversibly affects human steroid 5α-reductase 2, providing insight into its catalytic mechanism and disease-related mutations.

Hair follicles on the scalp interact with and respond to the nervous system, influencing their own behavior and growth.

Scalp dermatoscopy helps diagnose and monitor hair loss severity.

Hair loss in lupus is different from hair loss in alopecia areata and may indicate lupus activity.

Bariatric surgery affects skin health, causing both direct complications and changes in existing skin conditions, often related to nutritional deficiencies.

Dermoscopy has greatly improved the diagnosis of skin lesions and our understanding of their morphology and biology.

Trichoscopy is useful for diagnosing and monitoring systemic lupus erythematosus, with certain hair and scalp changes indicating more active disease.

Hair disorders are caused by a complex mix of biology, genetics, hormones, and environmental factors, affecting hair growth and leading to conditions like alopecia.

The study found that mouse sweat glands develop before birth, mature after birth, and have specific keratin patterns.

Trichoscopy is a useful tool for diagnosing hair and scalp issues, but doctors must be careful to avoid mistakes.

The document concludes that accurate diagnosis and treatment of scalp itch require differentiating between various conditions using a proposed five-step evaluation process.

Nanomaterials in biomedicine can improve treatments but may have risks like toxicity, needing more safety research.

The document concludes that dermal papilla cells are key for hair growth and could be used in new hair loss treatments.

Hair fibers interact through classical forces, which are influenced by treatments and products, important for hair care and other applications.

The study found that variations in hair protein genes are likely due to evolutionary deletions or duplications.

PBX1 helps hair stem cells grow and change by turning on certain cell signals and preventing cell death, which may be useful for hair regrowth treatments.

COVID-19 can cause various skin issues, including rashes and hair loss, which usually heal on their own and don't always indicate severe illness.

Dying cells can help with faster healing and new hair growth by releasing a growth-promoting molecule.

Mathematical modeling can improve regenerative medicine by predicting biological processes and optimizing therapy development.

Quercitrin may help treat hair loss by promoting hair growth and improving cell health.

Mutations in certain receptors can cause diseases and offer new treatment options.

Malva verticillata seed extract might help treat hair loss by activating hair growth signals in skin cells.

Hedgehog signaling is crucial for mammary gland development over hair follicles.

Testosterone applied to rabbit skin increases skin cell growth and changes skin structure.

FGF9 controls which receptors it binds to through a process where two FGF9 molecules join, and changes in FGF9 can lead to incorrect receptor activation.

Hair and scalp disorders significantly affect self-esteem, and using cosmetic products like conditioners and styling aids can improve hair health and appearance.

Adding human blood vessel cells to hair follicle germs may improve hair growth and quality.

Gene network oscillations inside hair stem cells are key for hair growth regulation and could help treat hair loss.

Merkel cells may have roles in sensing magnetic fields, creating fingerprints, Reiki energy healing, passing on environmental information to offspring, and influencing hair shape.