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Hedgehog signaling helps keep hair follicle stem cells the same in both young and old human skin.

High doses of cyproterone acetate increase the risk of brain tumors in women, but the risk decreases after stopping the medication.

Lower levels of certain brain chemicals are linked to worse PTSD symptoms in men.

The conclusion is that individual differences in COVID-19 severity are influenced by factors like age, sex, race, and genetics, which are important for personalized medicine.

Testosterone may slow down wound healing and increase inflammation.

Acne significantly affects mental health and quality of life, with research suggesting hormonal and genetic factors in its development and emphasizing early treatment to prevent scarring.

Androgens play a complex role in skin conditions like acne and hair loss in women, and normal blood levels don't always show true androgen status.

Finasteride can reduce fertility in some men, but stopping it increases sperm count.

Impaired androgen production in 46,XY DSDs causes ambiguous genitalia and requires long-term care.

Men with enlarged prostates often have more severe baldness.

IGF-1 injections help mice grow more hair by increasing cell growth and blocking a hair growth inhibitor.

Human liver cells stick to hair protein materials mainly through the liver's asialoglycoprotein receptor.

People with PCNT mutations often develop severe insulin resistance and early-onset diabetes during childhood or adolescence.

Hormones and their receptors, especially androgens, play a key role in hair growth and disorders like baldness.

Finasteride increases hair density in female androgenetic alopecia, but individual results may vary.

Using finasteride or dutasteride may cause long-lasting erectile dysfunction.

Valproic acid may help hair grow and could be a safe treatment for hair loss.

The protein StAR is found in 17 different organs and can affect hair loss and brain functions, but its full role is not yet fully understood.

Tooth papilla cells can help regenerate hair follicles and grow hair.

Thujae occidentalis semen extract may help treat male pattern baldness by blocking a hair loss-related enzyme and reducing hair loss in mice.

Goat reproductive activity and coat growth are affected by light and temperature, with temperature altering prolactin levels and hair growth, but not melatonin or estrus onset.

Natural 5α-reduced glucocorticoids might be anti-inflammatory with fewer side effects than current options.

Substance P may worsen acne by increasing inflammation, but corticosteroids might help by reducing this effect.

Activin B improves wound healing and hair growth by helping stem cells move using certain cell signals.

Too much AKR1C3 enzyme causes resistance to finasteride by increasing testosterone.

Some natural compounds can protect fish ear cells from damage by certain antibiotics without affecting the antibiotics' ability to fight infections.

Adding hyaluronic acid helps create larger artificial hair follicles in the lab.

Damaging mitochondrial DNA in mice speeds up aging due to increased reactive oxygen species, not through the p53/p21 pathway.

Basal cell carcinomas have much higher levels of Vitamin D3 receptors compared to healthy skin.

Micrografts improve hair density and thickness without side effects.