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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.

Most women with PCOS have high levels of male hormones, and free testosterone is the best marker for this.

The update highlights that non-classic congenital adrenal hyperplasia is common in women with excess male hormones, requires specific hormone tests for diagnosis, and has various treatment options depending on age and symptoms.

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.

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

Skin's Regulatory T cells are crucial for maintaining skin health and could be targeted to treat immune-related skin diseases and cancer.

Minoxidil is the only FDA-approved topical drug for treating male or female pattern hair loss, and other medications like finasteride and dutasteride can also increase hair growth.

Drug advertising has greatly increased, changing consumer behavior and raising concerns about its influence on healthcare and patient protection.

Researchers found that hair shedding happens mostly when new hair is growing and involves a unique process.

PDGFA/AKT signaling is important for the growth and maintenance of certain skin fat cells.

Olive oil compounds may help prevent cancer in animals, but human results are mixed.

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

MicroRNA-214 is important for skin and hair growth because it affects the Wnt pathway.

The document concludes that the hair cycle is a complex process involving growth, regression, and rest phases, regulated by various molecular signals.

Mutant CDP/Cux protein causes hair defects and reduced male fertility in mice.

Grafted rodent and human cells can regenerate hair follicles, but efficiency decreases with age.

Eating a high-glycemic diet may worsen acne by increasing certain protein levels and expressions in the skin.

Oxidative stress affects hair loss in men with androgenetic alopecia.

Melanocytes are crucial for skin pigmentation and can affect conditions like melanoma, vitiligo, and albinism, as well as hair color and hearing.

Certain genetic variations in the AR and ERβ genes can affect androgen levels in women.

The circadian clock is crucial for tissue renewal and regeneration, affecting stem cell functions and having implications for health and disease.

A new mutation in the human glucocorticoid receptor reduces its function and causes resistance to glucocorticoids.

The document concludes that molluscum contagiosum is a common, benign skin infection in children, often healing without scarring.

"Christmas tree" pattern helps diagnose female hair loss.

TCDD speeds up skin barrier formation by increasing certain gene expressions.

Mutant mice help researchers understand hair growth and related genetic factors.

The genus Sophora has compounds with potential health benefits and could lead to new drugs, but more research is needed to understand their effects and safety.

Feather growth and regeneration involve complex patterns, stem cells, and evolutionary insights.

Circadian rhythms are crucial for stem cell function and tissue repair, and understanding them may improve aging and regeneration treatments.

Hair mineral analysis might help diagnose diseases early, but standard methods are needed.