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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.

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

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

Understanding where cancer cells come from helps create better prevention and treatment methods.

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.

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

Certain cells from hair follicles can create new hair and contribute to hair growth when implanted in mice.

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

Androgens may cause hair loss by increasing TGF-beta1 from scalp cells, which inhibits hair cell growth.

Regulatory T-cells are important for healing and regenerating tissues in various organs by controlling immune responses and aiding stem cells.

Researchers found 19 genes important for root hair growth in a plant called Arabidopsis.

Estrogens can improve skin aging but carry risks; more research is needed on safer treatments.

Spironolactone is a safe and effective treatment for reducing excessive hair growth in women.

Androgens can help prevent memory problems caused by apoE4.

Erectile dysfunction is increasingly common in men under 40, with many physical and psychological causes, and various treatment options available.

Toxic Shock Syndrome mainly affects menstruating women, can recur, and is linked to staph bacteria, with rapid treatment being crucial.

Macrophages help activate hair follicle stem cells, affecting hair growth and skin repair.

Capsaicin, found in chili peppers, can slow down hair growth by affecting skin cells and hair follicles.

Wnt signaling controls whether hair follicle stem cells stay inactive or regenerate hair.

Oestrogens are key for bone growth during puberty in both boys and girls.

Mammalian organs regenerate using stem cells and cell plasticity, but this ability declines with age.

A substance called DKK-1 increases in balding areas and causes hair cells to die when exposed to DHT.

The peptide GHK-Cu helps heal and remodel tissue, improves skin and hair health, and has potential for treating age-related inflammatory diseases.

Certain inhibitors slow down plant growth by causing early cell specialization without changing the cell development pattern.

Estrogens significantly influence hair growth by interacting with receptors in hair follicles and may help regulate the hair growth cycle.

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

Tributyltin exposure causes sex changes, sterilization, and decline in the snail Ocinebrina aciculata, risking its extinction.

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.