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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.

Human hair has a new region with ordered filaments and the cuticle contains β-keratin sheets.

Hair's strength and flexibility come from its protein structure and molecular interactions.

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

Better hair care products are needed to protect against grooming and chemical damage.

FPHL causes hair loss in women due to genetics and hormones; minoxidil and anti-androgens are treatments, and early intervention is advised.

Grape seed oil improved hair quality the most, followed by rosehip and safflower seed oils, and reduced damage from shampoo.

Female pattern hair loss has multiple causes and treatments, with new therapies showing promise.

Skin structure complexity and variability are crucial for assessing skin toxicity in safety tests.

Hair loss can be managed with treatments like minoxidil, finasteride, and others, but there are still gaps in effectiveness and off-label usage is increasing.

Researchers created a mouse with the same mutation as humans with trichothiodystrophy, showing similar symptoms and confirming the condition is due to defects in DNA repair and gene activity.

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

Wool and hair fibers absorb moisture similarly due to their keratin structure, with the amount of non-crystalline areas affecting the moisture uptake.

A new method using poly(ethylene imine) improves hair dyeing at lower temperatures with better color retention.

PEI diffuses into hair at a constant rate, and urea speeds up this process.

L-phenylalanine and hydrolyzed eggwhite protein deeply penetrate human hair.

Urea helps hair dye penetrate better and last longer.

The study found that thioglycolic acid breaks down hair bonds more consistently than l-cysteine, which is less damaging to hair.

All five hair fiber products improved appearance but didn't stick to completely bald areas.

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

Keratin 33A is a key protein in goat winter coats, especially in high-producing breeds.

Treatments improved hair surface and scale structure but didn't increase certain bonds in the hair cortex.

The effectiveness of reducing agents on hair fibers depends on their electrode potentials.

Hair increases in size when it absorbs water, and treatments like bleaching affect how much water it can take in.

Hair fiber research combines multiple sciences to improve hair care products.

The document concludes that understanding hair's composition and the effects of treatments can lead to better hair care products.

Sheep and goat hair fibers are complex due to keratin-associated proteins, which are important for fiber properties and growth.

The study found nine new hair protein genes in human hair follicles.

Cysteine formation on hair indicates damage, best detected at pH 4.5.