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Older adults in Puerto Rico often couldn't be tested for hair cortisol due to refusal or lack of hair, with race and hair products affecting results.

Herbal depilatories are safer and cause fewer side effects than chemical ones for hair removal.

Continuous use of hair relaxers and curlers can cause hair loss, dryness, dandruff, thinning, greying, and split ends.

Sunlight and chemical treatments change hair's internal structure differently, needing specific care.

Chemical hair removal can cause skin irritation and other issues, but natural alternatives are being explored.

Combining traditional hair removal methods with modern technology could improve cosmetology.

Lifestyle choices like stress, smoking, heavy drinking, sun exposure, and chemical hair treatments might speed up hair loss in people with androgenetic alopecia.

Infrared and Raman imaging can non-destructively analyze hair structure and help diagnose hair conditions.

Straightening and coloring hair, especially with sodium hydroxide, greatly increases protein loss.

A tough membrane between the outer and inner layers of human hair protects it from damage.

The herbal hair gel mask made from flaxseed, fenugreek, and rice water is safe, effective, and promotes healthy hair and scalp.

Polyherbal hair dyes are safer and more eco-friendly than chemical dyes.

Better hair care products are needed to protect against grooming and chemical damage.

Current hair removal methods improve appearance but need more research for better options.

Infrared spectroscopy can analyze hair for forensic and medical insights.

Hair increases in size when it absorbs water, and treatments like bleaching affect how much water it can take in.

Modifying grooming techniques and using treatments like chemical depilatories or laser hair removal can help manage Pseudofolliculitis barbae.

Hair movement can indicate hair quality and health.

Hair damage shows as fragility, dullness, and discoloration, varies by ethnicity, and is worsened by cosmetic procedures and diseases.

Hair movement can indicate hair quality and health.

Certain chemicals and drugs can cause hair loss.

Hair follicle growth and fiber production in animals are influenced by chemical signals, proteins, pigmentation, genetics, and nutrients.

African hair is curled, Asian hair is thick, European hair is lighter, and chemical methods help identify hair color differences.

2-iminothiorane hydrochloride improves hair waving permanence without damage.

Selenium sulfide in anti-dandruff shampoos can turn hair green.

Curly hair breaks more easily, especially with chemical treatments, but simpler grooming reduces breakage.

Human hair absorbs calcium and magnesium from tap water, affecting its structure and styling properties.

Hair restoration in children, tailored to their specific needs, can yield good aesthetic results with minimal complications.

The herbal hair dye is a safe and eco-friendly alternative to conventional dyes.

Most hair loss cases are caused by four main conditions, and understanding them is key to treatment.