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The guidelines advise against using testosterone and DHEA in women for most conditions due to safety and effectiveness concerns, but suggest considering testosterone for postmenopausal women with low sexual desire.

Human skin can make serotonin and melatonin.

Wnt1/βcatenin signaling is crucial for heart repair after injury.

TGF-β is crucial for tissue repair and can cause diseases if not properly regulated.

Ectodin integrates BMP, SHH, and FGF signals in developing ectodermal organs.

Hair loss and aging are caused by the breakdown of a key protein in hair stem cells.

Chitin and chitosan are useful in cosmetics for oral care, haircare, and skincare, including UV protection and strength improvement.

Stem cells are crucial for skin repair and new treatments for chronic wounds.

Acne affects most teenagers and can continue into adulthood, with various treatments available that show improvement but have concerns like antibiotic resistance and side effects.

Androgen deprivation therapy for prostate cancer can cause sexual, physical, and psychological side effects, and doctors should manage these carefully.

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

Biomaterials with MSC-derived substances could improve tissue repair and have advantages over direct cell therapy.

Tiny pollution particles called PM2.5 can harm skin cells by causing stress, damage to cell parts, and cell death.

MK-0773 safely increased muscle mass but did not improve muscle strength or function in elderly women with sarcopenia.

The skin is a complex barrier for drug penetration, but understanding its structure and interactions can improve drug delivery methods.

Hair follicles help absorb and store topical compounds, aiding targeted drug delivery.

Noggin is necessary to start the hair growth phase in skin after birth.

Hair color production in mice is closely linked to the hair growth phase and may also influence hair growth itself.

Laser hair removal is the most requested cosmetic procedure and has become a scientifically-based treatment suitable for all skin types.

Platelet-rich plasma treatment significantly increased hair regrowth and decreased discomfort in alopecia patients, making it a potentially better and safer treatment option.

PGD2 stops hair growth and is higher in bald men with AGA.

Hormone therapy for trans individuals is effective and generally safe in the short term.

Overexpression of activin A in mice skin causes skin thickening, fibrosis, and improved wound healing.

Early diagnosis and treatment, using finasteride, minoxidil, or hair transplantation, improves hair loss outcomes.

Lactate production is important for activating hair growth stem cells.

Artificial skin development has challenges, but new materials and understanding cell behavior could improve tissue repair. Also, certain growth factors and hydrogel technology show promise for advanced skin replacement therapies.

Calcium affects where root hairs grow, but other unknown factors determine their growth direction.

A gene called APCDD1, which controls hair growth, is found to be faulty in a type of hair loss called hereditary hypotrichosis simplex.

Use minoxidil for hair loss; finasteride and dutasteride for men, dutasteride for women.

Sebocytes play a key role in controlling androgen levels in human skin.