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The document explains hair and nail biology, common hair loss conditions and treatments, oral and genital skin diseases, and the risks and treatments associated with squamous cell carcinoma.

Fine hairs improve male pattern baldness treatment, alopecia areata causes remain unknown, and hair can recover from dye damage over time.

An unhealthy scalp can damage new hair, but using ZPT shampoo can improve hair health.

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

Bleaching hair damages protein structure, especially keratin, leading to weakened hair.

Hair can't be reliably repaired once damaged; prevention and proper product use are key to maintaining hair health.

Immuno-cosmeceuticals from chicken egg yolk can effectively repair and improve damaged hair.

16-MHA can restore the barrier and moisture of damaged hair, making it similar to undamaged hair.

Cosmetic procedures can harm hair, but damage can be minimized with knowledge and care; however, once hair is damaged, it cannot be reliably repaired.

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

Asian hair is stronger and more damage-resistant than Caucasian hair due to a thicker cuticle layer.

Hair damage increases significantly with higher temperatures and longer heating times.

Using a hair dryer at 15 cm with continuous motion causes less damage than natural drying.

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

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

Using a blow dryer in a certain way can cause localized hair damage with bubble formation inside the hair.

Onion and Aloe vera can help protect hair from damage caused by hair dyes.

Protein hair straighteners damage the hair more than hair dyes.

Juglone from walnut extracts may help repair damaged hair.

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

Hair dyes and perms can damage hair and scalp, but using interventions can reduce harm.

Different oils affect hair flexibility and strength, with their impact varying on whether hair is virgin or bleached.

Chemical treatments severely damage hair cuticles, especially in previously treated hair.

Acidic sandy clay damages archaeological hair the most, while dry conditions preserve but make it brittle; silicone oil can help keep the hair flexible.

Frequent hair coloring and styling can damage hair and cause breakage or loss.

Healthy scalp leads to better hair quality and less damage.

Lupus can affect the scalp and nails, often causing hair loss and nail damage, and needs early aggressive treatment to prevent permanent damage.

Hair from people with seborrheic dermatitis is thicker scaled, more damaged, and thinner than healthy hair, and atomic force microscopy can help monitor the condition.

Hair problems can be caused by genetics or the environment, and treatment should focus on the cause and reducing hair damage.

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