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Hair greying is caused by oxidative stress damaging hair follicles and melanocytes.

Hedgehog signaling helps keep hair follicle stem cells the same in both young and old human skin.

Finasteride effectively treats male pattern baldness, improving hair growth and density.

Wnt signaling may be linked to heart diseases in aging and could be a target for future treatments.

Skin stem cells maintain and repair the outer layer of skin, with some types being essential for healing wounds.

Finasteride increases hair density in female androgenetic alopecia, but individual results may vary.

A 3-month stay in space causes skin thinning, disrupts hair growth, and changes muscle-related genes in mice.

Regenerative pharmacology, which combines drugs with regenerative medicine, shows promise for repairing damaged body parts and needs more interdisciplinary research.

Seborrhea in Parkinson's disease may be linked to hormones, not autonomic impairment.

Hormone imbalances can cause specific skin changes, which may help in early detection of endocrine disorders.

Thyroid hormone affects skin health, with too little causing rough, pale skin and too much leading to smooth, thin skin, and may also impact wound healing and skin conditions.

New research on prostamide F2α has led to treatments for glaucoma and eyelash growth and may have more medical uses.

Nanotechnology improves hair care products by enhancing ingredient stability, targeting treatment, and reducing side effects, but more research on its toxicity is needed.

Distinct β-catenin patterns are linked to cell growth, not cell death, in lung cancer.

Low serum complement levels in SLE patients don't always match with disease flares; monitoring C3 and C4 is useful, but cell-bound complement products might better indicate disease activity.

Herbal extracts and platelet-rich plasma together may help increase hair growth by making certain cells grow more, through specific cell growth pathways.

Tiny particles called extracellular vesicles could help with skin healing and hair growth, but more research is needed.

Different species and human skin models vary in their skin enzyme activities, with pig skin and some models closely matching human skin, useful for safety assessments and understanding the skin's protective roles.

Cell aging can be both good and bad for tissue repair.

Early treatment of superficial fungal infections in immunocompromised patients is crucial.

The document explains hair biology, the causes of hair loss, and reviews various hair loss treatments.

Transit-amplifying cells are crucial for tissue repair and can contribute to cancer when they malfunction.

Severe insulin resistance can be managed with medication, lifestyle changes, and treatment for related conditions.

Crash dieting can cause hair loss due to severe calorie restriction.

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.

Signaling pathways are crucial for hair growth in goats.

Both immature and mature fat cells are important for hair growth cycles, with immature cells promoting growth and mature cells possibly inhibiting it.

Radiation mainly affects keratinocyte stem cells, not melanocyte stem cells, causing hair to gray.

Thyroid hormones are important for skin health and might help treat skin diseases, but more research is needed to understand their effects fully.

Blocking the androgen receptor in skin cells reduces their growth response to male hormones, suggesting a possible treatment for skin conditions linked to androgens.