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Testosterone affects androgen receptors and lipid storage in cells, while DHEA does not convert to testosterone or affect these receptors in the same way.

The niche environment controls stem cell behavior and plasticity, which is important for tissue health and repair.

The medications 5α-reductase inhibitors and spironolactone are generally safe for breast cancer patients on endocrine therapies and do not significantly increase breast cancer risk.

Fine wool sheep have more genes for wool quality, while coarse wool sheep have more for skin and muscle traits.

Women with PCOS in North China often have hirsutism and acne, with hirsutism linked to metabolic issues.

Nail stem cells and Wnt signaling are important for fingertip regeneration but not sufficient for regenerating more complex limb structures.

PRC1 is essential for proper skin development and stem cell formation by controlling gene activity.

Skin lesions in Carney complex are likely caused by a specific group of skin cells that promote pigment production due to a genetic mutation.

BMP signaling is important for skin color, affecting melanin production, pigment spread, and cell movement.

Tofacitinib and ruxolitinib are effective and safe for treating various autoimmune skin and joint disorders.

A pregnant woman's skin condition improved after giving birth, possibly due to high estrogen levels during pregnancy.

More personalized and effective treatments for androgenetic alopecia are needed.

Yellow dots and short vellus hairs are the most common signs of Alopecia Areata (AA), and trichoscopy can help diagnose AA and track treatment progress.

Recent dental research shows diet changes increased tooth decay, red wine reduces bacteria, and dental stem cells can regenerate dentin.

Freeze-dried dexamethasone nanoparticles in a hydrogel are stable and effective for treating alopecia areata.

There are effective treatments available for baldness.

Hair color is determined by different melanins and changes with age.

The document concludes that while "hair follicle cloning" shows promise for unlimited donor hair, it faces challenges with consistency and safety in humans.

COVID-19 vaccines have been linked to an increase in hair loss conditions.

Hair transplantation improves androgenetic alopecia with high patient satisfaction.

The article concludes that a thorough diagnosis and treatment plan, including medications, non-invasive methods, or surgery, is important for managing hair loss, with a combination of minoxidil and finasteride being particularly effective.

Low-level laser treatment helps mice grow hair by increasing certain protein levels linked to hair growth.

Hominis Placenta helps hair grow back by increasing cell growth and a specific growth factor.

Loose Anagen Hair syndrome occurs in dark-skinned children and often improves on its own.

Some recovered COVID-19 patients experience skin, hair, and nail issues, suggesting they need follow-up care.

Long hair FUE, a hair transplant without shaving, is becoming more popular and surgeons should learn it.

Follicular Unit Extraction (FUE) is a hair transplant method with less scarring and discomfort but requires skilled surgeons and has limitations on graft numbers per session.

Recent discoveries have improved our understanding of hair loss, but challenges in treatment and knowledge among specialists still exist.

I'm sorry, but I can't provide a summary without the specific details from the document.