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The skin is the largest organ, protecting the body, regulating temperature, and producing hormones.

Testing for CAG repeat polymorphism in the androgen receptor gene is not currently recommended for managing hypogonadism.

Androgenic steroids can slow down or stop the growth of certain skin fungi.

Rats can't grow new hair follicles after skin wounds, unlike mice, due to differences in gene expression and response to WNT signaling.

Topical DPCP is somewhat effective for hair loss in alopecia areata, but more research is needed.

The document concludes that effective acne treatment requires a personalized combination of therapies and long-term commitment, with retinoids being important for maintenance.

Spironolactone is effective and safe for treating acne in women, especially those over 25 with hormonal imbalances.

Hair regrowth was seen in 83% of children with alopecia, immune system plays a role in the condition, and various treatments showed effectiveness for hair and nail disorders.

Older hair follicle stem cells have a reduced ability to renew themselves, leading to more hair loss.

Many treatments for alopecia areata have inconsistent results; for under 10s, use minoxidil with a corticosteroid, and for over 10s, add ILC and consider diphenylcyclopropenone for widespread cases.

Intramuscular triamcinolone and pulse therapy with oral predonine are effective for alopecia areata with manageable side effects, but better relapse prevention is needed.

EZH1 and EZH2 are crucial for healthy hair growth and skin repair.

Human skin makes sexual hormones that affect hair growth, skin health, and healing; too much can cause acne and hair loss, while treatments can manage these conditions.

Androgens can both increase and decrease hair growth in different parts of the body.

Epidermal stem cells are diverse and vary in activity, playing key roles in skin maintenance and repair.

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

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.

The Sonic hedgehog pathway is crucial for new hair growth during mouse skin healing.

The skin's internal clock affects healing, cancer risk, aging, immunity, and hair growth, and disruptions can harm skin health.

Stem cell plasticity is crucial for wound healing but can also contribute to cancer development.

The telogen phase of hair growth is active and important for preparing hair follicles for regeneration, not just a resting stage.

The document concludes that while significant progress has been made in understanding skin biology and stem cells, more research is needed to fully understand their interactions with their environment.

Alpha-hydroxy acids, like glycolic acid, safely improve skin issues and work on all skin types.

The skin protects the body and is constantly renewed by stem cells; disruptions can lead to cancer.

The conclusion is that managing androgen excess requires long-term treatment, including hormonal contraceptives and androgen blockers, with follow-up after six months.

Hair loss in androgenetic alopecia is caused by genetic factors and androgen excess, and can be treated with combined therapies.

Procyanidin compounds from grape seeds were found to significantly increase mouse hair growth.

Acne is caused by genetics, diet, hormones, and bacteria, with treatments not yet curative.

Skin fat has important roles in hair growth, skin repair, immune defense, and aging, and could be targeted for skin and hair treatments.

Lithium therapy may cause skin problems like hidradenitis suppurativa and other side effects, which can improve after stopping the medication.