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The skin systems of jawed vertebrates evolved diverse appendages like hair and scales from a common structure over 420 million years ago.

Human scalp hair follicles can produce hormones and have a system similar to a brain-body communication network.

Scientists created complete hair-like structures by growing mouse skin cells together in a special gel.

New digital tools are improving the diagnosis and understanding of irreversible hair loss conditions.

Trichoscopy helps tell apart Frontal Fibrosing Alopecia and Lichen planopilaris by showing different hair and scalp features.

Collagen from tilapia scales may improve hair and skin health by reducing stress and inflammation and encouraging hair growth.

Yellow dots and short vellus hairs are the most common signs of Alopecia Areata (AA), and trichoscopy can help diagnose AA and track treatment progress.

Body hairs can be used in forensic science and toxicology like scalp hair.

Botulinum toxins are safe for various medical and cosmetic uses, but more research is needed for long-term safety and effectiveness in hair growth treatments.

A patient with a scalp condition and benign skin tumor experienced hair loss and did not improve with treatment, choosing not to have surgery despite a small cancer risk.

Hemp is a promising ingredient for skin products due to its healing and soothing properties.

Cannabidiol shows promise as an effective treatment for acne.

Eating disorders can cause skin problems, which may help with early diagnosis and treatment.

The fascial layer is a promising new target for wound healing treatments using biomaterials.

Functional foods can improve hair and skin health.

Choosing the right method to separate skin layers is key for good skin cell research.

Many hospitalized children with COVID-19 had skin, mouth, or nail changes, with skin rashes being common.

Understanding how androgens and their receptors work can lead to improved treatments for skin diseases.

CD117 and platelet-derived growth factor receptor α may play a role in alopecia areata.

Hair loss in men may be caused by inflammation triggered by hormones, and treatments reducing inflammation could potentially promote hair growth.

Trichoscopy is an effective, noninvasive method for early diagnosis of Female Pattern Hair Loss.

Trichoscopy shows hair diameter variability, vellus hairs, and the peripilar sign are key indicators for diagnosing Androgenetic Alopecia.

Long COVID causes a wide range of long-lasting symptoms that change over time and are hard to diagnose and treat.

The article concludes that creating a detailed map of normal human skin at the single-cell level is important.

Trichoscopic features help diagnose and assess female pattern hair loss severity, with inflammation playing a key role.

Key proteins and pathways regulate wool fiber diameter in Alpine Merino sheep.

Nanotechnology could improve hair regrowth but faces challenges like complexity and safety concerns.

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.

The document concludes that understanding hair follicle histology and the hair cycle is crucial for diagnosing alopecia.

The research found no clear link between the severity of male baldness and the scalp examination findings in Indonesian men.