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Erectile dysfunction is increasingly common in men under 40, with many physical and psychological causes, and various treatment options available.

Demodicosis is common and often missed, needing more recognition and treatment in skin care.

Male hormones, particularly DHT, are linked to male pattern hair loss, and treatments like finasteride can help, but they don't work for postmenopausal women's hair loss, which may have different causes.

Estrogens significantly influence hair growth by interacting with receptors in hair follicles and may help regulate the hair growth cycle.

Dermatoscopy and videodermatoscopy are useful for diagnosing and monitoring various skin, hair, and nail conditions.

Too much androgen can cause hair loss; finasteride may help.

TGF-β signaling is crucial for stem cell maintenance, differentiation, and has implications for cancer treatment.

Skin grafts on mice can cause an immune response leading to hair loss, useful for studying human hair loss conditions.

The document concludes that understanding hair structure is key to diagnosing hair abnormalities and recommends gentle hair care for management.

Stem cell plasticity is crucial for wound healing but can also contribute to cancer development.

Male pattern baldness involves hormones and cell signals affecting hair growth.

The document concludes that while significant progress has been made in understanding skin biology and stem cells, more research is needed to fully understand their interactions with their environment.

No effective treatment for frontal fibrosing alopecia was found, but oral 5-alpha-reductase inhibitors had the best response; for lichen planopilaris, topical corticosteroids were commonly used but had a high relapse rate.

JAK inhibitors help with skin conditions but need more research on dosing and safety.

Scientists turned rat thymus cells into stem cells that can help repair skin and hair.

Some drugs can cause skin, nail, and hair problems, which are important for healthcare professionals to recognize and report.

Animals that change color with the seasons mainly do so in response to daylight changes, but climate change is causing camouflage problems that may require evolutionary changes.

Lignans and neolignans from plants may help protect against various health issues, including cancer and heart disease.

Hair, teeth, and mammary glands develop similarly at first but use different genes later.

The paper concludes that the 1982 criteria for diagnosing systemic lupus erythematosus need updating to improve accuracy and involve dermatologists in the process.

Lampreys have a functional vitamin D receptor that may help detoxify harmful substances.

The Protein-Sparing Modified Fast is effective for rapid weight loss and maintaining it, but requires medical supervision and can have side effects.

New treatments for Alopecia Areata show promise but need to be more effective and affordable.

Finasteride may cause slight depression and anxiety.

Antiandrogens affect androgen-dependent body functions and are used for various medical conditions, with some risks like fetus feminization, but new forms like 17α-propylmesterolone show promise for acne without systemic effects.

Treatments for permanent hair loss from scarring aim to stop further loss, not regrow hair, and vary by condition, with partial success common.

The document concludes that understanding the genes and pathways involved in hair growth is crucial for developing treatments for hair diseases.

New antifungal treatments for a children's scalp infection are effective and safe, but it's not decided if they will become the preferred option over the old treatment.

Alopecia areata is likely caused by a combination of genetic factors and immune system dysfunction, and may represent different diseases with various causes.

BMP2 and BMP7 have opposite roles in feather formation.