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Water and fatty acids affect hair's surface differently based on hair damage, and models can help understand hair-cosmetic interactions.

Ammonium bisulfite in hair bleach can cause facial eczema.

A meadowfoam seed oil derivative can penetrate and repair human hair.

Outside factors like grooming, chemicals, and the environment can damage hair and cause disorders.

Natural products in cosmetics are beneficial for skin and hair care with low toxicity.

The most common cause of hair loss in children is tinea capitis, followed by alopecia areata and telogen effluvium.

Certain hairstyles and less hair oil use in African American girls can lead to scalp conditions like traction alopecia and seborrheic dermatitis.

Most patients with cicatricial alopecias face significant psychological and social challenges due to their hair loss.

Hair care cosmetics affect hair health; know products, ingredients, and procedures.

To diagnose hair loss, use a systematic approach including history, exams, and tests.

Hair styling products can damage hair over time.

Hair care products can cause skin irritation and allergies due to certain chemicals.

The study found that pili bifurcati causes hair to intermittently split into two branches, each with its own outer layer.

Chemical hair straightening improves smoothness and shine but may cause side effects, suggesting a need for safer methods.

Hair shape is determined by genetic, molecular, and cellular factors.

Blumea eriantha DC extract shows strong potential for promoting hair growth.

Gender affects hair and scalp characteristics, with differences in hormone responses, graying patterns, and trace metals.

Hair fibers interact through classical forces, which are influenced by treatments and products, important for hair care and other applications.

Black bean, wheat, and rice bran extracts can improve hair growth and quality.

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

Hair dyes vary in how long they last and how deeply they penetrate hair.

Backhousia citriodora leaf extract effectively reduces oily skin across different ethnic groups.

Solute binding to hair keratin is mainly driven by hydrophobic interactions and changes with pH.

Broussonetia papyrifera extract helps hair growth by regulating specific proteins.

Southeast Asian herbs show promise for skin and hair care, but more research is needed to confirm their effectiveness in cosmetics.

The document concludes that more research is needed to better understand and treat primary cicatricial alopecias, and suggests a possible reclassification based on molecular pathways.

Older people's hair cuticles get more easily damaged and lose protective oils, especially in their 40s and 50s.

Dermatologists need to understand hair products to treat hair and scalp issues better.

Phytochemicals in hair masks can help with damaged hair, seborrhea, and hair loss.

Tying a knot can measure hair friction, useful for medical applications.