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Microspheres about 1.5 micrometers in size can best penetrate hair follicles, potentially reaching important stem cells.

Finasteride treats enlarged prostate and may help with baldness, but effects on sexual function and male fetuses are unclear.

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

Nanoparticles improve drug delivery through the skin but more research is needed on their long-term effects and skin penetration challenges.

Pig skin is a good substitute for human skin to measure drug absorption, but differences in skin structure and enzymes across species must be considered.

Too much androgen can cause hair loss; finasteride may help.

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

Testosterone treatment in trans men increases body and facial hair and may lead to hair loss over time, but severe skin issues are rare.

Fullerenes show potential in skin care but need more safety research.

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

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.

Nanoparticles can improve skin treatments by better targeting hair follicles, but more research is needed for advancement.

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

The conclusion is that recognizing hair growth cycles can improve the precision of dietary and health assessments from hair analysis.

Hidradenitis suppurativa treatment should be tailored to the individual, with quitting smoking being important.

Hair follicle stem cells are a promising source for tissue repair and treating skin or hair diseases.

Dermatologists play a key role in treating skin symptoms of PCOS like dark patches, excess hair, acne, and hair loss.

The balance between androgen receptor and p53 is crucial for sebaceous gland differentiation.

The guide explains how to study human and mouse sebaceous glands using various staining and imaging techniques, and emphasizes the need for standardized assessment methods.

Ice-skating athletes often have skin problems due to cold, infections, and inflammation, needing careful treatment and prevention.

Substance P may worsen acne by increasing inflammation, but corticosteroids might help by reducing this effect.

The article concludes that advancements in hair cosmetics require dermatologists to stay informed about products and their potential risks, including allergies and higher risks for hairdressers.

Nanotechnology improves hair care products by enhancing ingredient stability, targeting treatment, and reducing side effects, but more research on its toxicity is needed.

Nanoemulsion creams with certain enhancers can greatly increase caffeine delivery through skin.

Tiny particles carrying roxithromycin can effectively target and deliver the drug to hair follicles without irritation.

Hormone treatments can help with women's skin and hair disorders, but they need careful monitoring and more research.

Finasteride effectively treats male hair loss, improving growth and density.

The arrector pili muscle might play a role in hair loss and needs more research to understand its impact.

The article concludes that developing in vitro models for human hair structures is important for research and reducing animal testing, but there are challenges like obtaining suitable samples and the models' limitations.