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Melatonin affects many body functions beyond sleep by interacting with specific receptors in various tissues.

Hair follicle development is controlled by interactions between skin tissues and specific molecular signals.

Understanding phenotypic plasticity is crucial for developing effective cancer therapies.

Dehydroepiandrosterone (DHEA) is a prohormone important for producing sex steroids and has potential health benefits.

Testosterone is important for men's sexual function, may help some women's sexual desire, while other hormones and neurotransmitters also play complex roles in sexual behavior.

Itraconazole is potentially effective for treating invasive aspergillosis, but more research is needed.

Hair regeneration needs dynamic cell behavior and mesenchyme presence for stem cell activation.

The Endocrine Society advised against routine testosterone therapy for women, citing a need for more research on long-term safety and a clear definition of androgen deficiency.

Epithelial-mesenchymal interactions control hair growth cycles through specific molecular signals.

The document concludes that the fast-growing direct-to-consumer genetic testing market lacks sufficient regulation, posing risks to consumers due to questionable test quality and accuracy.

Hidradenitis suppurativa, a chronic skin disease, can be managed with antibiotics, lifestyle changes, and in severe cases, surgery. Early diagnosis and careful planning are key, and laser treatment can be an efficient solution for mild to severe cases.

Some patients taking finasteride or dutasteride may have ongoing sexual problems and depression even after stopping the medication.

Melatonin may help with sleep issues, depression, and cancer, but more research is needed.

Planarian regeneration begins with a specific gene activation caused by injury, essential for healing and tissue regrowth.

Lifestyle changes can improve body composition, excess male hormone levels, and insulin resistance in women with PCOS.

Different animals have unique versions of the enzyme that changes testosterone into another hormone, which is important for creating effective treatments for prostate and hair loss conditions.

Hair and wool have complex microscopic structures with microfibrils and varying cystine content.

Finasteride for hair loss can cause long-lasting sexual side effects like low libido and erectile dysfunction.

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

Humans lost body hair relatively recently in evolution.

Congenital Adrenal Hyperplasia is a genetic disorder with two forms, causing symptoms like early puberty and severe acne, but can be identified through screening and treated with glucocorticoids.

Keratinocytes help heal skin wounds by interacting with immune cells and producing substances that kill pathogens.

The WNT signaling pathway is important in many diseases and targeting it could offer new treatments.

The document concludes that a better understanding of cell changes during wound healing could improve treatments for chronic wounds and other conditions.

Keratose, derived from human hair, is a non-toxic biomaterial good for tissue regeneration and integrates well with body tissues.

Male pattern hair loss could hint at androgens affecting COVID-19 severity.

Normal skin cell renewal doesn't need RAR signaling, but vitamin A-related skin thickening does.

TRP channels in the skin are important for sensation and health, and targeting them could help treat skin disorders.

MicroRNA-302 helps improve the conversion of body cells into stem cells by blocking NR2F2.

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.