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Acidic sandy clay damages archaeological hair the most, while dry conditions preserve but make it brittle; silicone oil can help keep the hair flexible.

Curved human hair has different structures on each side, which might cause its shape and is similar to wool.

A thorough history and examination are crucial for diagnosing skin diseases, which affect up to a third of people. This includes details about skin lesions, medication, general health, lifestyle, family, and contacts, as well as examining the rash, hair, nails, and mucous membranes. Changes in hair and nails can also indicate other medical and skin disorders.

Nanoparticles penetrate hair follicles better when their size matches the cuticula thickness.

The onychodermis helps anchor the nail bed and may aid in nail formation.

Human nails contain both skin and hair keratins, each needing different extraction methods.

Hair splitting and nail detachment are linked conditions.

Keratins are crucial for cell stability, wound healing, and cancer diagnosis.

Hair follicle biology advancements may lead to better hair growth disorder treatments.

Lgr5 is a marker for active, long-lasting stem cells in mouse hair follicles.

The document concludes that skin stem cells are important for hair growth and wound healing, and could be used in regenerative medicine.

Hair follicles are complex, dynamic mini-organs that help us understand cell growth, death, migration, and differentiation, as well as tissue regeneration and tumor biology.

Understanding developmental pathways can improve wound healing treatments.

Understanding gene expression in hair follicles can reveal insights into hair growth and disorders.

Half of people with Alopecia Areata may see hair regrowth within a year without treatment, but recovery is unpredictable.

EZH1 and EZH2 are crucial for healthy hair growth and skin repair.

The conclusion is that certain cell interactions and signals are crucial for hair growth and regeneration.

Certain proteins, Lgr5 and Lgr6, are important markers of adult stem cells and are involved in tissue repair and cancer development.

The skin's layers protect, sense, and regulate the body's internal balance, but can be prone to cancer.

Epithelial-mesenchymal interactions control hair growth cycles through specific molecular signals.

Hoxc13 gene is essential for hair, nail, and papilla development.

Future hair loss treatments should aim to extend hair growth, reactivate resting follicles, reverse shrinkage, and possibly create new follicles, with gene therapy showing promise.

Chitin and chitosan are useful in cosmetics for oral care, haircare, and skincare, including UV protection and strength improvement.

A new method quickly extracts and identifies proteins from hair and other keratin sources.

The document concludes that understanding hair follicle biology can lead to better hair loss treatments.

The document provides a method to classify human hair growth stages using a model with human scalp on mice, aiming to standardize hair research.

A gene called APCDD1, which controls hair growth, is found to be faulty in a type of hair loss called hereditary hypotrichosis simplex.

Most women with excess hair growth have an underlying hormonal issue, often treated with medication and hair removal methods.

The hedgehog signaling pathway is crucial for hair growth but not for the initial creation of hair follicles.

Hair and wool have complex microscopic structures with microfibrils and varying cystine content.