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Confocal microscopy is better than scanning electron microscopy for studying hair in its natural state and understanding hair products' effects.

Researchers found a new gene, hacl-1, that is active in mouse hair follicles during hair growth and may be important for hair biology.

Mutations in hKAP1 genes may cause hereditary hair disorders.

Bubble hair deformity may be caused by hair shaft trauma and can improve with gentle hair care.

The cell membrane complex in mammalian hair has three distinct types with different structures and chemical properties.

Men with hormonal imbalances similar to PCOS may have increased risk of metabolic and heart diseases.

The STIM1 R304W mutation in mice leads to bone changes and teeth hair growth.

Involucrin helps strengthen the inner parts of human hair.

Researchers extracted tiny keratin filaments from human hair by unzipping its outer layer.

TGF-alpha is present in sheep and ferret skin and may affect hair growth without directly stimulating cell proliferation.

The skin has about 230,000 touch-sensitive nerve fibers, with high concentrations in the hands and face.

Hair is made of strong keratin fibers that protect against the environment.

Beautiful hair is flexible and elastic due to its unique double-layered structure and can be enhanced with succinic acid treatment.

The document concludes that specific hair and blood vessel abnormalities in infants with seizures and developmental issues may indicate Menkes disease, which lacks a cure and is often fatal by age 3.

Human hair medulla doesn't break down hydrogen peroxide, which may affect hair color formation.

Human hair's strength comes from a honeycomb-like structure and macrofibrils.

Horse skin has a layered epidermis, a dermis with hair follicles, sweat and sebaceous glands, and is supplied by small arteries.

Neonate scalp hair is thinner, lacks a medulla, and has smaller follicles compared to adult hair.

Yak hair stretches mainly due to macromolecules slipping past each other.

Curly and straight hair differ in how their internal fibers are arranged.

Ziehl-Neelsen's stain helps identify different parts of hair in sheep and goats.

Hair thinning and loss in a girl with a rare metabolic disorder was linked to her condition.

Two specific hair keratin genes are active during hair growth and decline as hair transitions to rest.

The document concludes that hair curvature can be explained by the growth patterns caused by the shape and separation of cells in the hair follicle and is affected by specific molecular pathways.

Epithelial cells from young rat hair follicles grow and form aggregates in culture, but don't produce hair keratin proteins.

A woman's symptoms of increased body hair and testosterone were caused by a rare adrenal tumor, which was removed successfully.

Curved human hair has different structures on its convex and concave sides.

A woman with Cushing's syndrome improved after surgery to remove an adrenal tumor.

A rare adrenal tumor in a woman only made DHEA-S, causing hair thinning, and was removed, fixing the hormone level.

The document suggests that male hormones likely affect hair growth and baldness, and future treatments might involve stem cells and androgen-independent cells.