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

Healthy scalp leads to better hair quality and less damage.

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

Certain polymers can stick to hair and increase volume, working best at a pH of 7 to 9.

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

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

Larger spheroids improve hair growth, but size doesn't guarantee thicker hair.

Nanoparticles around 600-700 nm can effectively enter and stay in hair follicles for days, which may help in delivering drugs to specific cells.

The article concludes that advancements in hair cosmetics require dermatologists to stay informed about products and their potential risks, including allergies and higher risks for hairdressers.

Different ethnicities and treatments affect human hair strength and structure.

Permanent hair dye damages hair but it mostly recovers after 8 weeks; using certain hair care products can help repair it.

Excipients greatly affect how well curcumin nanocrystals penetrate the skin and target hair follicles.

Chitosan-coated dutasteride nanocapsules improve hair treatment, and physical stimulation boosts effectiveness.

Good haircare and communication with doctors are key for managing hair loss.

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

The hair follicle bulge is an important area for adult stem cells involved in hair growth and repair, with potential for medical use needing more research.

Reducing copper (II) ion levels in hair can decrease hair damage.

Cedrol Nanoemulsion was found to be more effective at promoting hair growth than traditional treatments and had better bioavailability.

Melanin density affects hair color, and this method can help in cosmetic assessments and diagnosing hair diseases.

Henna dye improves hair cuticle and thickness but effects vary by hair type and health.

Washing hair daily is better and preferred, with no negative effects.

A new method accurately measures amino acids in treated hair, showing bleaching reduces amino acids while protein treatments increase them.

Hair's resistance to wear varies by ethnicity and treatment, with less wear indicating stronger hair.

Hair stiffness increased by 13.2% after caffeine treatment, validating the Stiffness-Angle Law as an effective measurement method.

The enzymatic method can effectively identify chemical treatments on hair.

Human hair structure varies by ethnicity, and certain treatments can improve hair condition and appearance.

Indian medicinal plants can help with hair growth and common hair issues.

Protein hair straighteners damage the hair more than hair dyes.

Water quality affects mineral content in hair, and coconut oil can protect against damage.

Keratin hydrogels from human hair show promise for tissue engineering and regenerative medicine.