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

Involucrin helps strengthen the inner parts of human hair.

Hair stiffness increased by 13.2% after caffeine treatment, validating the Stiffness-Angle Law as an effective measurement method.

Stress-related substance P may lead to hair loss and negatively affect hair growth.

Bleaching hair removes its protective top layer and exposes more hydrophilic groups, changing its chemical surface and affecting how it interacts with products.

Dopamine stops hair growth and pigment production in human scalp hair follicles.

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.

Cold waving solutions quickly reduce cystine to cysteine in hair.

Hydrogenated palm oil repairs and conditions damaged hair by preventing swelling.

Plasma jet treatments can clean hair and might replace peroxide for hair care.

Psoriasis patients' immune response to a hair protein depends on their specific gene type.

Gambogic Amide helps maintain hair color and promotes hair growth.

sPLA2-IIA increases growth in hair follicle stem cells and cancer cells, suggesting it could be targeted for hair growth and cancer treatment.

Hedgehog signaling helps keep hair follicle stem cells the same in both young and old human skin.

Wnt3a activates certain genes in hair follicle cells, including a newly discovered one, EP2, which may affect hair growth.

Researchers created early-stage hair-like structures from skin cells, showing how these cells can self-organize, but more is needed for complete hair growth.

Bleaching and combing damage hair's surface and mechanical properties.

Certain proteins and their receptors are more active during the growth phase of human hair and could be targeted to treat hair disorders.

Non-ionic silicone emulsion best protects hair color from sunlight.

The proteins transthyretin and megalin are more present in the growth phase of hair, suggesting they might affect hair health and growth.

Certain mutations in the KLHL24 gene cause a skin disorder by breaking down an important skin protein.

Air wedge interferometry is a precise, cost-effective way to measure hair thickness.

Blue light promotes hair growth by interacting with specific receptors in hair follicles.

Glycyrrhizic acid and licorice extract can significantly reduce unwanted hair growth.

A new mutation, Glu402Lys, in hair keratin is linked to variable symptoms of monilethrix.

Pal-KCV peptide strengthens hair and reduces breakage by up to 52%.

New mutations in hair keratin genes cause the rare hair disorder monilethrix.

TET enzymes are important for skin and hair development by controlling gene activity in specific areas.

Human hair has a complex, variable structure with a consistent matrix and double-twist pattern.

Human hair color is determined by melanin types and genetic factors.