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Hormones, especially androgens, play a big role in acne, but most acne sufferers don't have a hormone disorder. Hormonal treatments, including birth control pills, can be very effective for women whose acne doesn't improve with regular treatments.

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.

Androgens have complex effects on hair growth, promoting it in some areas but causing hair loss in others, and our understanding of this is still evolving.

Zinc is crucial for nutrition, especially in patients with specific health conditions, and requires careful supplementation and monitoring.

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.

Finasteride may cause long-lasting sexual side effects.

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

Too much Smad7 can cause serious changes in skin tissues, including problems with hair growth, thymus shrinkage, and eye development issues.

Understanding the mouse hair cycle is crucial for cancer research.

High-dose dutasteride reduces PMDD symptoms by stabilizing neurosteroid levels.

Testosterone treatment in trans men increases body and facial hair and may lead to hair loss over time, but severe skin issues are rare.

New treatments targeting specific genes show promise for treating keratin disorders.

Choosing the right model order in brain connectivity analysis can affect the detection of differences between healthy individuals and those with seasonal affective disorder.

Lowering testosterone speeds up wound healing in male mice.

The document concludes that hair is complex, with a detailed growth cycle, structure, and clinical importance, affecting various scientific and medical fields.

New single-cell analysis techniques are improving our understanding of stem cells and could help in treating diseases.

Scientists created stem cells that can grow hair and skin.

Finasteride may cause slight depression and anxiety.

Hair ages due to genetics and environmental factors, leading to graying and thinning, with treatments available for some conditions.

Hair follicles are hormone-sensitive and involved in growth and other functions, with potential for new treatments, but more research is needed.

No treatment fully prevents hair loss from chemotherapy yet.

Hair elemental analysis could be useful for health and exposure assessment but requires more standardization and research.

A WNT10A gene mutation leads to ectodermal dysplasia by disrupting cell growth and differentiation.

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

Minoxidil effectively treats severe hypertension but may cause side effects, so careful monitoring is needed.

Notch/CSL signaling controls hair follicle differentiation through Wnt5a and FoxN1.

EGF makes hair follicles grow longer but stops hair production.

Newborn mouse skin cells can grow hair and this process can be recreated in adult cells to potentially help with hair loss.

Wnt signaling helps control how brain stem cells divide and is important for brain repair after injury.

Obesity increases the risk of developing polycystic ovary syndrome, and weight loss can improve the condition.