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Visible light can damage skin and most sunscreens don't block it well; more research is needed on its effects and protection methods.

Dutasteride and finasteride may reduce sperm count and volume but don't affect movement or shape; effects are reversible after stopping.

Targeted cancer therapies often cause serious skin problems that need careful management.

Some herbal therapies may help with skin conditions, but more research is needed to confirm their safety and effectiveness.

The PDGF/PDGFR pathway is a potential drug target with mixed success in treating various diseases, including some cancers and fibrosis.

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

Alopecia areata involves immune activation in the scalp, suggesting treatments targeting TH1, TH2, and IL-23 pathways.

Lower doses of treatments for hirsutism and acne in PCOS are effective and cause fewer side effects.

Hair follicle stem cells are key for hair and skin regeneration, can be reprogrammed, and have potential therapeutic uses, but also carry a risk of cancer.

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

Vitamin D and its receptor regulate skin functions like cell growth, immunity, hair cycle, and tumor prevention.

Alopecia areata causes hair loss, has no cure, and various treatments exist.

The document concludes that more research is needed to better understand and treat primary cicatricial alopecias, and suggests a possible reclassification based on molecular pathways.

Laser hair removal effectiveness depends on targeting hair structures without harming the skin, and improvements require more research and expert collaboration.

Patients with certain skin symptoms and high ANA titers should be monitored for potential systemic lupus.

The document concludes that accurate diagnosis of ichthyosis is crucial for treatment and genetic advice, and ongoing research is needed for better therapies.

Cancer cells often have more copies of TERT and TERC genes, which helps them grow and could affect patient outcomes.

Targeting the IL-23/IL-17 pathway effectively treats several inflammatory skin diseases.

Skin aging is due to impaired stem cell mobilization or fewer responsive stem cells.

Eating less sugar, milk, and saturated fats and more vegetables and fish may help treat and prevent acne.

Exosomes could potentially enhance tissue repair and regeneration with lower rejection risk and easier production than live cell therapies.

Adam10 enzyme is crucial for healthy skin and proper Notch signaling.

The conclusion is that Treg-targeted therapies have potential, but more knowledge of Treg biology is needed for effective treatments, including for cancer.

Eating disorders like anorexia and bulimia cause skin problems, and dermatologists can help detect these disorders early for better treatment outcomes.

Stress can stop hair growth in mice, and treatments can reverse this effect.

Men generally have more severe COVID-19 cases and higher death rates than women due to biological differences.

Janus kinase inhibitors are promising treatments for autoimmune skin diseases like eczema and psoriasis.

Targeting androgen receptors could be a promising way to treat skin disorders with fewer side effects.

The document describes how to tell different types of non-scarring hair loss apart by looking at hair and scalp tissue under a microscope.

Estrogens help reduce skin aging, and SERMs might offer similar benefits without the risks of hormone therapy.