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Hair disorders are caused by a complex mix of biology, genetics, hormones, and environmental factors, affecting hair growth and leading to conditions like alopecia.

Products should be called 'sperm-safe' only after thorough, well-designed tests.

Most patients with Porphyria Cutanea Tarda had skin blisters and were often affected by hepatitis C and alcohol abuse, with differences between familial and sporadic cases.

Lower LDL-c levels predict higher COVID-19 mortality.

The Leechbook shows how hair and sexual health were key to medieval masculinity and some remedies may still be useful.

Male hormones may play a role in the development of heart disease, and more research is needed to understand their effects.

The document concludes that understanding hair structure is key to diagnosing hair abnormalities and recommends gentle hair care for management.

Longer anogenital distance may indicate a higher chance of having polycystic ovary syndrome, and measuring this distance along with hormone levels could improve diagnosis.

Fat-derived stem cells may help treat skin aging and hair loss.

Fat-derived stem cells and their secretions show promise for treating skin aging and hair loss.

The guidelines recommend informed consent for gender-affirming treatments and stress the importance of personalized, culturally sensitive care for transgender individuals.

Genes and hormones cause hair loss, with four genes contributing equally.

Certain drugs change freshwater snail shells to a "banana" shape.

Human hair follicle cells can grow hair when put into mouse skin if they stay in contact with mouse cells.

Wnt signaling is important for development and cell regulation but can cause diseases like cancer when not working properly.

Genetic defects in testosterone production can cause hormonal and developmental disorders, and more research is needed to understand androgen regulation and develop safer treatments.

Cathepsin L is essential for normal hair growth and development.

Understanding how epigenetic regulation affects stem cells is key to cancer insights and new treatments.

Early hormones shape sex-specific differences in rat glands.

Men and women react differently to opioids, with hormones potentially influencing these differences.

SHBG binding properties are unchanged in male liver cirrhosis patients.

Measuring reproductive hormones in brown bear hair could help identify their sex and reproductive state, but better collection methods or lab techniques are needed.

The document concludes that there are still unknowns about the effectiveness, risks, and detection of performance-enhancing drugs, and doping remains a challenge.

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

Finasteride treats enlarged prostate and baldness, but may cause limited urinary improvement and sex-related side effects.

Healthcare providers need better education and policies to serve transgender individuals effectively.

High doses of testosterone disrupt hormone levels and receptor expression in the uterus, affecting fertility.

Teak leaf extract contains compounds that could help treat hair loss.

Beta-caryophyllene helps improve wound healing in mice, especially in females.

LGBT individuals have unique skin health needs, including higher STD risks and side effects from gender-affirming treatments, requiring dermatologists to offer knowledgeable and culturally competent care.