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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.

Aging in hair follicle stem cells leads to hair graying, thinning, and loss.

pH, calcium, and reactive oxygen species regulate plant cell growth, with key roles for NADPH oxidases and plasma membrane H+-ATPases.

ALA-photodynamic therapy helps reduce acne by causing acne cell death and lowering certain skin protein levels.

Hirsutism is excessive male-pattern hair growth in women, often caused by hormonal imbalances, and requires ongoing treatment to manage.

Apple extract called procyanidin B-2 was found to greatly increase hair growth.

Natural molecules like inositols, resveratrol, vitamins, and omega-3 fatty acids may help manage Polycystic Ovary Syndrome (PCOS), but their effects vary and need more exploration.

Herbal nano-formulations show potential for effective skin delivery but need more research.

Bleaching hair removes its protective top layer and exposes more hydrophilic groups, changing its chemical surface and affecting how it interacts with products.

White hair grows thicker and faster than black hair due to higher activity of growth-related genes and proteins.

CD98hc's role in skin health decreases with age.

Finasteride reduces prostate bleeding by affecting blood vessel growth.

ALA-PDT is effective and safe for chronic X-ray dermatitis, providing complete or partial remission.

Improved dermabrasion techniques in 1987 led to better treatment results for skin issues like acne scars.

Minoxidil doesn't affect perifollicular lymphoid infiltration in alopecia areata patients.

Chitosan and surface-deacetylated chitin nanofibers may help treat hair loss.

Polyamines are important for hair growth, but more research is needed to understand their functions and treatment potential.

The document concludes that managing hirsutism involves identifying the cause, using a scoring system for severity, combining cosmetic and medical treatments, encouraging weight loss, and providing psychological support, while noting the need for more research on drug treatments.

Hair fibers interact through classical forces, which are influenced by treatments and products, important for hair care and other applications.

Glutathione helps Arabidopsis roots adapt to low phosphate by regulating a specific growth pathway.

Ancient Chinese goats evolved cashmere-producing traits due to selective breeding, particularly in genes affecting hair growth.

High levels of auxin increase root hair growth by activating RSL2 and producing ROS, while high phosphate levels hinder growth by repressing RSL2.

Women with PCOS have higher xanthine oxidase activity linked to inflammation and heart disease risks.

Hair treatments cause significant structural changes, especially with excessive heat, regardless of ethnicity.

Ozone therapy might improve cancer treatment and reduce its side effects.

Plant root hair growth is mainly controlled by hormones like auxin and ethylene, which promote growth, while others like brassinosteroid inhibit it.

Hibiscus rosa-sinensis may help treat various health issues and promote hair growth, but more research is needed for safety.

Hair sunscreens are important for maintaining hair's cosmetic value.

Consider benefits and risks of new alopecia treatments for safety.

Mesenchymal stem cells, especially injected into the skin, heal wounds faster and better than chitosan gel or other treatments.