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The document explains how hair is studied in forensics to identify its source and its role in criminal investigations.

Different populations have distinct hair structures related to their ancestry.

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

Ultraviolet rays damage hair, smoking may cause hair loss, and good nutrition is important for hair health, but genetics mainly decide hair thickness.

Human hair follicles may provide a noninvasive way to diagnose diseases and have potential in regenerative medicine.

Proper hair care and safe use of hair products are crucial for those with hair loss.

Low zinc levels might contribute to early hair graying.

UVB radiation changes the chemical makeup and dries out human hair but doesn't alter its appearance or texture.

Circadian clock genes are important for hair growth and may affect aging-related hair loss and graying.

Non-coding RNAs are important for hair growth and could lead to new hair loss treatments, but more research is needed.

UV radiation significantly damages hair, especially with humidity, making it more vulnerable to further damage.

Nanomaterials can improve hair care products and treatments, including hair loss and alopecia, by enhancing stability and safety, and allowing controlled release of compounds, but their safety in cosmetics needs more understanding.

Low copper levels might cause premature graying of hair.

Children with early graying hair might have lower levels of certain nutrients like zinc, magnesium, and Vitamin B12.

Human hair varies widely and should be classified by curl type rather than race.

Hair sunscreens are important for maintaining hair's cosmetic value.

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

Herbal extract shampoo increased certain minerals in hair and improved hair growth and scalp health.

Hair and nails are skin parts that develop early and serve protective and functional roles.

Hair color is determined by melanin produced and transferred in hair follicles.

Hair care products with placental growth factor can improve hair thickness and density in postpartum hair loss.

Hyaluronic acid filler injections are a favored non-surgical method to improve facial aging signs due to their convenience, effectiveness, and durability.

Polydopamine is a safe, effective, and permanent hair dye that turns gray hair black in one hour.

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

Blocking BACE1 and BACE2 enzymes causes hair color loss in mice.

We don't fully understand how sunlight damages different types of hair.

Hair diversity is influenced by complex genetics and environmental factors, requiring more research for practical solutions.

Palmitoyl tetrapeptide-20 may help reduce hair greying and increase melanin production.

Silibinin-loaded micelles significantly protect hair from UV-B damage.

Human hair keratin might be good for filtering out harmful substances from water.