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Polycystic ovary syndrome (PCOS) was first described in 1721, officially diagnosed in the 1990s, and is now known to be partly genetic and linked to insulin resistance, with increased risk of cardiovascular disease and carbohydrate metabolism issues.

The study identifies the pheromone gland's location and structure in Endoclita vietnamensis, aiding future pest control methods.

Free fatty acids in sebum boost skin's defense against acne by increasing antimicrobial peptides.

The document recommends using both clinical evaluation and various measurement methods to assess skin greasiness, considering factors like temperature and hormones.

17-β-Estradiol applied to the skin stops hair growth, while ICI 182 780 helps hair grow in mice.

Using an enzyme and keratin treatment can significantly repair and strengthen damaged hair.

Effective sunscreen formulations can reduce skin absorption and enhance protection.

Alopecia Areata causes significant structural and compositional changes in hair.

The study found that horizontal sections of scalp biopsies are better for analyzing hair loss, showing fewer hairs and more fine hairs in balding areas.

Wnt3a protein, when packed in liposomal vesicles, can stimulate hair growth and could potentially treat conditions like hair loss.

Superoxide dismutase (SOD) can prevent hair graying in mice.

Spanlastic-laden nanogel could be a better way to deliver hair growth medication through the skin for treating hair loss.

Nanoparticles sized between 470 and 750 nm are best for delivering substances like caffeine into hair follicles for absorption.

The chapter explains why and how women remove unwanted hair, comparing methods like shaving and waxing.

Chemical hair straightening changes hair proteins and mostly fixes broken bonds.

Scientists created a non-toxic, sugar-based hair product that can style hair without damage.

Melatonin reduced oxidative damage, inflammation, and protected hair cells in scalded rats.

The CRH/CRH-R1 system might be involved in causing lichen planus.

The document reports unique growth lines in a child after Stevens-Johnson syndrome, skin reaction from parsnips and sun in a girl, and itchy skin with xanthomas in a boy with Alagille syndrome.

Skin health and repair depend on the signals between skin stem cells and their surrounding cells.

The research showed how melanocytes develop, move, and respond to UV light, and their stem cells' role in hair color and skin cancer risk.

Adding human hair fibers and glass micro-spheres to epoxy improves its wear resistance and strength.

Ruxolitinib and tofacitinib are effective and safe for treating severe alopecia areata.

An 82-year-old man's white hair regained color after taking etretinate for psoriasis.

The device applies substances directly to body tissues, improving cell transplant and treatment processes.

Copper (II) albumin complex improves healing of severe burns by its antioxidant, anti-inflammatory, and pain relief properties.

Lipid nanoparticles can help deliver drugs through hair follicles but struggle to penetrate deeper skin layers.

Vitamin D and its receptor are essential for hair growth, cell regulation, immune function, and heart health.

The combination of watermelon skin extract and banana trunk liquid promotes hair growth in male white rats.

The document concludes that more research is needed to understand airway repair and to improve tissue engineering for lung treatments.