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Precocious puberty in girls is linked to cosmetics, pollution, light exposure, early sexual information, diet, and hereditary factors.

The article concludes that dermatologists should prescribe lifestyle drugs carefully and consider mental health treatments for patients with disorders like BDD.

Different species and human skin models vary in their skin enzyme activities, with pig skin and some models closely matching human skin, useful for safety assessments and understanding the skin's protective roles.

Most over-the-counter hair loss treatments lack strong evidence of effectiveness, except for minoxidil, which works but stops working if you stop using it.

The document concludes that managing health issues like menopause, cardiovascular risk, and hair loss is crucial for promoting longevity in aging women.

The skin acts like an endocrine organ, producing hormones that affect various body functions and skin health, and understanding this can lead to new treatments.

Sunlight worsens hair loss; protect scalp.

Stephen Rothman made important discoveries in dermatology, including the use of PABA in sunscreens, but never profited from his work.

Oxidative stress and immune dysfunction are linked to both Hashimoto's thyroiditis and polycystic ovary syndrome, with diet and specific treatments important for managing these conditions.

Ayurvedic herbs may reduce side effects and improve effectiveness of cancer treatments.

Low zinc and selenium levels in sheep are linked to hair loss and thyroid problems.

Manipulating the catagen and telogen phases of hair growth could lead to treatments for hair disorders.

DNA profiling in forensics has improved, but predicting physical traits and ancestry from DNA has limitations and requires ethical consideration.

Human hair varies widely and should be classified by curl type rather than race.

Black skin requires specific cosmetic practices, which can sometimes cause skin issues due to product misuse, and there's a need for better regulations in sub-Saharan Africa.

The long-pulse alexandrite laser is good for removing hair and treating skin problems like spots and veins.

Melanin density affects hair color, and this method can help in cosmetic assessments and diagnosing hair diseases.

Hair is complex, varies in type, and plays a big role in attractiveness and culture.

Bleaching hair causes severe structural and chemical damage, including protein loss and oxidation.

Effective pain relief methods for photoepilation include topical anesthetics, cooling devices, and skin stimulation.

Lasers can help reduce skin side effects from cancer treatment.

Hair with more melanin resists weather damage better.

Cirsium japonicum flower extract increases melanin production and could help treat depigmentation conditions.

Blond hair lightens more with visible light directly, while ultraviolet light lightens it after washing by damaging other hair parts.

Melanin absorbing light is necessary but not enough for effective hair removal by light treatment.

Liposomes can improve hair care and treat hair issues effectively.

Melanocytes are destroyed by factors needed for melanin production, causing vitiligo and gray hair.

Rose stem cell nanoparticles improve skin quality by boosting collagen, aiding cell movement, reducing melanin, and lowering inflammation.

Grape seed oil improved hair quality the most, followed by rosehip and safflower seed oils, and reduced damage from shampoo.

Southeast Asian herbs show promise for skin and hair care, but more research is needed to confirm their effectiveness in cosmetics.