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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.

Nanomaterials can improve hair care products and treatments, including hair loss and alopecia, by enhancing stability and safety, and allowing controlled release of compounds, but their safety in cosmetics needs more understanding.

K18® and Olaplex® both effectively repair bleached hair, improving its strength, smoothness, and overall health.

Statins may help treat PCOS by lowering androgen levels and improving cholesterol.

Finasteride-loaded proniosomes effectively promote hair growth in mice.

The conclusion is that thorough investigation of hypertension and hormonal dysfunctions is important, and there may be a link between these conditions and cancer.

Hair lipids do not protect against humidity.

A mother's western diet can make her milk toxic, causing inflammation and hair loss in babies.

Sebaceous glands can heal and regenerate after injury using their own stem cells and help from hair follicle cells.

Pangolins have lost some skin-related genes, but kept others, leading to their unique scales and skin features.

Pangolins have lost some skin-related genes, but kept others, showing complex skin evolution.

Most adrenal cortex tumors are benign and non-secreting, but proper diagnosis and treatment are important due to the rare possibility of cancer.

Sebum production varies by individual and is influenced by age, gender, and hormones, affecting skin and hair health.

Men and women experience skin aging differently due to changes in sex hormone levels with age.

Isoflavone may help manage PCOS symptoms, but its effectiveness is uncertain.

Epidermal stem cells are diverse and vary in activity, playing key roles in skin maintenance and repair.

Oral retinoids can cause side effects ranging from mild to severe, including birth defects, and require careful monitoring and contraception.

Merkel cells may have roles in sensing magnetic fields, creating fingerprints, Reiki energy healing, passing on environmental information to offspring, and influencing hair shape.

Fat cells in the skin help start healing and form important repair cells after injury.

Ion-paired risedronate significantly increases skin penetration without irritation compared to risedronate alone.

Lipopolysaccharides boost wheat seedling growth, but procyanidin B2 weakens this effect.

Skin cells produce and activate vitamin D, which regulates skin functions and supports hair growth.

Pig skin is a good substitute for human skin to measure drug absorption, but differences in skin structure and enzymes across species must be considered.

Blocking a specific enzyme might help treat obesity and diabetes, but more research is needed to ensure it's safe.

Human hair's ability to get wet is complex and can change with treatments, damage, and environment.

The protein StAR is found in 17 different organs and can affect hair loss and brain functions, but its full role is not yet fully understood.

Human hair has more unsaturated fats inside than on the surface, and certain lipids may help bind the outer and inner layers together.

Curly hair breaks more easily, especially with chemical treatments, but simpler grooming reduces breakage.

Certain diseases like AIDS and lupus can make African hair become silky.

Eastern Red Bat hair contains various glycerophospholipids, mainly phosphatidylcholine.