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

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

An intelligent system can classify hair follicles and measure hair loss severity with reasonable accuracy.

Curly hair is mechanically different from straight hair and may need new testing methods.

Hair straightening methods have advanced to improve effectiveness and reduce damage, but still rely on heat and chemicals.

Hair straightening changes hair structure and can cause damage if done wrong, but improvements in the methods are expected to continue.

Black hair's diversity in patterns and textures is influenced by follicle shape and keratin, and it holds cultural, artistic, and mathematical significance.

New methods can better classify curly hair types and lead to improved hair care products.

Hair curvature in Japanese people is linked to specific cell types and filament arrangements in the hair cortex.

New methods to classify curly hair types were developed based on shape and strength.

Children's hair grows in different types from before birth through puberty, with growth rates and characteristics varying by age, sex, and race.

A new system for classifying curly hair types using precise measurements can improve hair care products and cultural inclusion.

The new SFS Scale predicts hair transplant difficulty using hair and skin types, with thick skin and coily hair being hardest to work with.

Dr. Norwood's analysis highlights the need for careful patient selection and strategic hair transplant design to create a natural-looking hair density.

Curly and straight hair differ in how their internal fibers are arranged.

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

The editor suggests removing "race" and "ethnicity" from dermatology and creating tools to objectively assess skin color and hair texture.

The article concludes that uniform density hair restoration is generally preferred for its natural look, but the best approach depends on the individual's characteristics and preferences.

Permanent hair waving uses chemicals to create long-lasting curls.

The document concludes that proper diagnosis and a combination of medical, hair-care, and surgical treatments are important for managing alopecia in black women.

Future hair cosmetics will be safer and more effective.

Hair restoration surgery has evolved over time, with a focus on natural-looking results and managing patient expectations, while also considering potential complications and the lifelong progression of male pattern baldness.

A hair-straightening product caused widespread hair loss and scalp injuries, mainly affecting African American women.

Hair transplant complications can be avoided with proper training and understanding.

Long hair follicular unit excision is effective for hair transplants, providing quick, natural-looking results with less pain but needs more time, staff, and skill.

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

Different ethnicities and treatments affect human hair strength and structure.

Hair properties are interconnected; a comprehensive, cross-disciplinary approach is essential for understanding hair behavior.

Facial hair transplantation has improved to give natural-looking beards and eyebrows with proper technique and patient care.

The document concludes that understanding hair loss and considering medical treatments like minoxidil and finasteride before surgery is important, especially for young patients with rapid hair loss, and that hairline design varies among different ethnicities.