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

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

The research found a way to measure hair surface changes by analyzing how light reflects off of it, and determined hair cuticle angles vary by hair length and color.

The study found that minor protein differences between curved and straight Japanese hair are unlikely to significantly affect hair structure.

Hair color affects light reflection, with black hair having higher cuticle angles and lighter hair showing less specular reflection.

Human hair can be classified into eight types based on physical features, not ethnicity.

Tightly curled scalp hair helps reduce heat from the sun, protecting against overheating.

New method uses hair follicle cells to estimate human body clock phase, potentially improving sleep disorder diagnosis.

African hair is curled, Asian hair is thick, European hair is lighter, and chemical methods help identify hair color differences.

A mutation in the KRT74 gene causes tightly curled hair.

Older people's hair becomes less shiny because it gets more uneven and curved.

Hair curvature in Japanese people is linked to specific cell types and filament arrangements in the hair cortex.

Curved hair can develop when hair cells merge abnormally during growth.

Curly hair shape is due to uneven growth patterns in the hair follicle.

The study found that the Marangoni effect causes the uneven wetting of surfactant-coated hair due to the surfactant moving into the water.

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

Hair from breast cancer patients shows changes in structure and composition, and a test using these changes detected cancer but also falsely identified some healthy samples as cancerous.

Thioglycolic acid mainly affects the unordered areas in hair structure.

Hair analysis can show nutritional status and environmental exposure, with phosphorus being very stable in hair and differences found based on gender and conditions like depression and autism.

Permanent wave treatment with thioglycolic acid changes hair structure by altering disulfide bonds.

High levels of testosterone and dihydrotestosterone inhibit hair cell growth, while high levels of estradiol promote it.

DNA can predict physical traits like eye and hair color accurately, especially in Europeans, but predicting other traits and in diverse populations needs more research.

A genetic variant in the KRT25 gene causes tightly curled hair.

A red fox with skin lesions was cured of a fungal infection after treatment.

Mouse hair follicles age, causing more white hairs due to fewer pigment stem cells.

Hair analysis can effectively detect diabetes and aging markers.

Hair curliness is caused by the arrangement and length of two different cell types.

Human hair is unique and important for understanding human evolution and identity.

Human hair has a natural biomagnetic field.

Human hair follicles' biomagnetic fields might contribute to migraines.