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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.

Finasteride and minoxidil are effective for hair regrowth, while treatments for alopecia areata have varying success and continuous treatment is necessary.

The document concludes that accurate diagnosis of different types of hair loss requires careful examination of hair and scalp tissue, considering both clinical and microscopic features.

Wool follicles are complex, involving interactions between different cell types and structures.

The yeast Pityrosporum ovale can cause skin allergies and infections, and antifungal treatments like ketoconazole are effective against it.

Hair grays due to oxidative stress and fewer functioning melanocytes.

Minoxidil and finasteride treat hair loss; more research needed for other options.

Prolactin affects the production of different keratins in human hair, which could lead to new treatments for skin and hair disorders.

Sunlight worsens hair loss; protect scalp.

HIV can cause unusual and severe skin problems that are hard to treat.

Platelet lysate is a promising, cost-effective option for regenerative medicine with potential clinical applications.

Thyroid function affects skin health, with a complex interaction between the two.

Topical immunotherapy, especially with DPCP, is effective for treating severe alopecia areata.

Lymphatic vessels are essential for hair follicle growth and skin regeneration.

Blocking JAK/STAT pathways can help treat hair loss from alopecia areata.

Early diagnosis and treatment are crucial for preventing permanent hair loss in various scalp conditions, and while new treatments are promising, more research is needed to evaluate their effectiveness.

Melatonin protects skin against UV damage by regulating various cellular processes.

Certain fats in the skin help control inflammation and health, and changing these fats through diet or supplements might treat skin inflammation.

Alopecia areata, a type of hair loss, is likely an autoimmune disease with a genetic link, but its exact cause is still unknown.

Facial aging is caused by natural processes and external factors, and can be managed with preventative measures and a variety of treatments tailored to individual needs.

Graying hair happens due to aging and might be delayed by new treatments.

The document says that treating the root cause of hair follicle damage is crucial to prevent permanent hair loss, and treatment options vary.

Horizontal scalp biopsy sections are better for diagnosing alopecia areata, showing fewer hair follicles and more miniaturized hairs.

Laser and light therapies, especially the 308 nm excimer laser, are effective and safe for treating alopecia areata, but more research is needed.

Different types of scarring alopecia may be stages of one disease, and accurate diagnosis is crucial to prevent permanent hair loss.

Glutamic acid helps increase hair growth in mice.

Some skin diseases and their treatments can negatively affect male fertility.

Special and immunohistochemical stains are not routinely needed for diagnosing hair disorders.

The conclusion is that a combination of noninvasive treatments and lifestyle changes can improve skin health during menopause.

Skin reactions to drugs are common and can be deadly, usually requiring stopping the drug and may be better prevented with genetic testing in the future.