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AFM helped show how hair changes under tension and the effects of damage and conditioner.

Papain and bisulfite break down human hair by dissolving parts of it.

Dye enters hair at the edges of cuticle cells and penetrates more from water than alcohol-based solutions.

Chemical hair straightening changes hair proteins and mostly fixes broken bonds.

Human hair's ability to get wet is complex and can change with treatments, damage, and environment.

Hair ages as the cuticle wears down, especially beyond 1 meter from the root, affecting its strength and shine.

mHa2 and mHa3 keratins have different structures and roles in mouse hair and tongue tissues.

Permanent waving weakens hair by altering its protein structure.

Nanotechnology improves hair care products by enhancing ingredient stability, targeting treatment, and reducing side effects, but more research on its toxicity is needed.

Growing hair follicles have high mitochondrial activity and ROS in specific regions, aiding hair formation.

The dye quickly penetrates hair follicles, mainly through the gap, not the surrounding skin.

The research found two types of calcium in human hair, one that varies among individuals and another that is consistent across people.

Loose anagen hair syndrome is caused by structural abnormalities in the hair follicle's inner root sheath.

Hair bleaching causes significant damage to hair and skin.

Bleaching hair causes severe structural and chemical damage, including protein loss and oxidation.

Hair has unevenly distributed proteins and lipids, with lipids mainly in the cuticle and proteins in the cortex and medulla.

Different populations have distinct hair structures related to their ancestry.

Melanin in black hair protects it from sun damage better than light-brown hair.

Hair malformations may occur due to timing issues in hair development.

Hair is mostly made of three protein types: helical, high-sulfur, and high-tyrosine.

μ-Crystallin may help hair growth by affecting thyroid hormone levels in mouse hair follicles.

Mice with the naked gene have missing or abnormal hair cells.

Chemical treatments and daily stresses damage hair, especially the cuticle layer.

Human hair has different protein structures in its cuticle and cortex.

Hair follicle cells become four types: medulla, cortex, cuticle, and inner root sheath.

Antler velvet hair and body hair of red deer have different structures that help with protection and insulation.

Sunlight damages hair, causing cuticle loss, protein changes, and discoloration.

Hair in mammals likely evolved from glandular structures, not scales.

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

Holes in mature hair are likely caused by the removal of substances during hair care.