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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.

Two main types of fibroblasts with unique functions and additional subtypes were identified in human skin.

Insulin resistance and obesity are key factors in the development and worsening of polycystic ovary syndrome, and lifestyle changes are important for managing it.

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

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

Metformin helps manage polycystic ovary syndrome by improving insulin resistance and ovulation, but more research is needed on its full effects.

High levels of male hormones, insulin resistance, and obesity are closely linked and worsen polycystic ovary syndrome, but more research is needed to improve treatments.

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

Stress stops hair growth in mice by causing early hair growth phase end and harmful inflammation through a specific nerve-related pathway.

Hair follicle development and microbes help regulatory T cells gather in newborn skin.

Minoxidil boosts growth factor in hair cells, potentially promoting hair growth.

Alopecia areata is likely an autoimmune disease with unclear triggers, involving various immune cells and molecules, and currently has no cure.

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

Men are more likely to have severe COVID-19 cases and fatalities than women due to factors like lifestyle, aging, and biological differences.

Skin cells produce and activate vitamin D, which regulates skin functions and supports hair growth.

Alopecia areata is an autoimmune condition causing hair loss due to the immune system attacking hair follicles, often influenced by genetics and stress.

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

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

Platelet-rich plasma with a new carrier significantly increases hair thickness without serious side effects.

Zinc is effective for treating various skin conditions, including warts and acne.

Blocking COX, especially COX-2, in the skin can reduce inflammation and pain and may help prevent skin cancer.

Telocytes might help with skin repair and regeneration.

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

The document concludes that recognizing and treating cutaneous lupus erythematosus early is crucial for managing the skin and potential systemic symptoms.

Tight junctions are key for skin protection and controlling what gets absorbed or passes through the skin.

Memory T cells in the skin balance staying put and moving into the blood, clustering around hair follicles, and increasing in number after infection.

Male pattern baldness involves genetics, hormones, and needs better treatments.

Male and female skin differ due to hormones, affecting conditions like hair loss, acne, and skin cancer, and suggesting a need for gender-specific treatments.

Effective treatments for male pattern baldness include oral finasteride and topical minoxidil, while topical minoxidil is best for female pattern baldness.