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The research identified two types of keratinocytes in chicken scales: one for hard scales and another for soft skin, with similarities to human skin differentiation.

New hair follicle-targeting treatments show promise for hair disorders but need more research on safety and effectiveness.

Testosterone therapy can help improve mood, sexual function, and bone health in women with low androgen levels, but more research is needed to establish safe and effective guidelines.

Botanical extracts are increasingly important in cosmetics and drugs for their effectiveness and safety, backed by traditional use and scientific evidence.

Mild essential fatty acid deficiency can cause health issues and is worsened by low-fat diets.

PAI-2 helps in the maturation and protection of hair and nail cells.

Matriptase is highly active in hair follicles and sebaceous glands, especially during hair growth phases.

Misbehaving hair follicle stem cells can cause hair loss and offer new treatment options.

Melatonin receptors in hair follicles help regulate hair growth and could treat hair loss.

The skin has multiple layers and cells, serves as a protective barrier, helps regulate temperature, enables sensation, affects appearance, and is involved in vitamin D synthesis.

Hair from breast cancer patients shows changes in structure and composition, and a test using these changes detected cancer but also falsely identified some healthy samples as cancerous.

Rosacea is a skin condition with unclear causes, classified into four subtypes.

Nanotechnology shows promise for better chronic wound healing but needs more research.

Skin problems can be caused or worsened by physical forces and pressure on the skin.

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

The guide explains how to study human skin fat cells and their tissue, aiming to improve research and medical treatments.

Serenoa repens and N-acetyl glucosamine/milk proteins complex may help with hair growth and prevent hair loss.

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

Fermented papaya and mangosteen in hair care products helped prevent hair loss and improve hair thickness.

Water and fatty acids affect hair's surface differently based on hair damage, and models can help understand hair-cosmetic interactions.

Infrared and Raman imaging can non-destructively analyze hair structure and help diagnose hair conditions.

Spin traps like PBN could protect skin from pollution and sunlight in cosmetics but need more research for safe use.

Synthetic polypeptides in cosmetics may help with anti-aging, but their effectiveness on real skin is uncertain.

ADSC-derived extracellular vesicles show promise for skin and hair regeneration and wound healing.

The document concludes that while significant progress has been made in understanding skin biology and stem cells, more research is needed to fully understand their interactions with their environment.

Lipids are important for healthy hair, but their exact role is not fully understood and needs more research.

Nanomaterials in biomedicine can improve treatments but may have risks like toxicity, needing more safety research.

Different types of facial fat affect aging and treatment outcomes; more research is needed to enhance anti-aging procedures.

Melatonin in the skin helps protect against damage from stress and UV rays, and could be used to treat certain skin conditions.

Particle properties affect drug retention and release in minoxidil foams, with lipid nanoparticles having higher loading capacity.