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Particles around 100 nm can penetrate and stay in hair follicles without passing through healthy skin, making them safe for use in topical products and useful for targeted drug delivery.

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

Adult female acne treatment should be personalized, considering individual preferences and pregnancy, using various topical and oral medications while managing side effects and resistance.

Targeting hair follicles can improve skin treatments and reduce side effects.

The document concludes that understanding the sebaceous gland's development and function is key to addressing related skin diseases and aging effects.

Hirsutism is more linked to high androgen levels than acne or hair loss, and a mix of hormonal tests is best for diagnosis; certain treatments can reduce symptoms.

5α-reductase is essential for male sexual development and its inhibitors have potential in treating various conditions related to hormone action.

Hair ages due to genetics and environmental factors, leading to graying and thinning, with treatments available for some conditions.

An mFG score of 5 or more indicates above-normal hair growth in Southern Chinese women.

Finasteride effectively blocks rat enzymes, but with varying methods and strength.

Hormones significantly affect hair and oil gland function in the skin, and more research is needed on skin-related hormone disorders.

The document concludes that accurate diagnosis and personalized treatment are important for skin problems in women with PCOS.

Trichoscopy is a useful, non-invasive way to diagnose different types of hair loss.

Peripilar signs can help diagnose androgenetic alopecia and reveal its cause.

Eating a high-glycemic diet may worsen acne by increasing certain protein levels and expressions in the skin.

The unit area trichogram is a reliable method to assess hair loss and treatment response in people with androgenic alopecia by measuring hair density and thickness.

Trichoscopy helps diagnose and monitor alopecia areata by looking at a combination of specific hair and scalp features.

New antifungal treatments for a children's scalp infection are effective and safe, but it's not decided if they will become the preferred option over the old treatment.

New hormonal contraceptives are safer, have fewer side effects, and offer health benefits for women.

Skin changes can help diagnose and manage endocrine disorders like thyroid problems, diabetes, and adrenal gland conditions.

Skin development in mammals is controlled by key proteins and signals from underlying cells, involving stem cells for maintenance and repair.

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

Drugs penetrate scalp skin better than abdominal skin, with scalp hair follicles aiding in higher drug delivery.

DHEA stimulates skin oil glands and could help postmenopausal women, with potential for acne and excessive hair growth treatments.

Finasteride can cause lasting sexual, emotional, and cognitive issues, with varying severity.

The Lexington LaserComb helped regrow hair in mice with a condition similar to human hair loss.

Testosterone therapy seems safe for postmenopausal women for a few years, but more research is needed for long-term effects.

Hormonal treatments can help with acne, especially in women, by lowering androgen levels or blocking their effects.

The document concludes that various clinical methods are used to assess ageing skin and the effectiveness of anti-ageing products.

Environmental factors, hormones, nutrition, and stress all significantly affect skin health and aging.