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Animal models have helped understand hair loss from alopecia areata and find new treatments.

Testosterone therapy seems safe for postmenopausal women for a few years, but more research is needed for long-term effects.

Correcting nutrient deficiencies may help with hair loss, but the benefits of supplements without a deficiency are uncertain and could be harmful.

Muscles and nerves that cause goosebumps also help control hair growth.

Fat cells are important for healthy skin, hair growth, and healing, and changes in these cells can affect skin conditions and aging.

Certain mice without specific receptors or mast cells don't lose hair from stress.

Hair grays due to oxidative stress and fewer functioning melanocytes.

The conclusion is that hair growth can be improved by activating hair cycles, changing the surrounding environment, healing wounds to create new hair follicles, and using stem cell technology.

The HR protein's role as a repressor is essential for controlling hair growth.

The document concludes that skin biopsies, genetic and environmental factors, and specific treatments are important in managing cutaneous lupus erythematosus.

S100A4 and S100A6 proteins may activate stem cells for hair follicle regeneration and could be potential targets for hair loss treatments.

Testosterone treatment effectively causes male physical development in transgender male adolescents but may lead to side effects like acne, higher BMI and blood pressure, lower good cholesterol, and decreased bone density.

The p53 protein helps control hair follicle shrinking by promoting cell death in mice.

Advanced human skin models improve drug development and could replace animal testing.

The FOXN1 gene is crucial for developing immune cells and preventing immune disorders.

PCOS affects women's health by increasing the risk of diabetes, heart disease, and reproductive issues.

Some hair loss can be treated, especially in women due to nutrition, but some types remain untreatable.

Women with PCOS often feel stigmatized and have mood issues, which can lower their sexual satisfaction, but proper treatment and support can help.

Shrinking skin cancer increases the chance of cancer in nearby lymph nodes.

The document concludes that for hair and feather growth, it's better to target the environment around stem cells than the cells themselves.

Black ethnicity, prior PSA tests, enlarged prostate, and family history increase prostate cancer risk; Asian ethnicity, obesity, smoking, diabetes, and less sexual activity or no children decrease risk.

Children with scalp fungal infections need proper diagnosis and treatment, usually with antifungal medications, and newer drugs may offer quicker recovery.

Researchers found 63 genes linked to male-pattern baldness, which could help in understanding its biology and developing new treatments.

Some birth control pills have a higher risk of blood clots than others.

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

Hair growth is influenced by interactions between skin layers, growth factors, and hormones, but the exact mechanisms are not fully understood.

The review recommends hormone replacement therapy for women with premature ovarian insufficiency to manage symptoms and protect health, with specific approaches for different groups.

There are still challenges in diagnosing and treating chronic skin diseases, but there is hope for future improvements.

Understanding how hair follicle stem cells work can help find new ways to prevent hair loss and promote hair growth.

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