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The study developed a method to analyze ancient hair proteins using very small samples.

Measuring reproductive hormones in brown bear hair could help identify their sex and reproductive state, but better collection methods or lab techniques are needed.

The wolves suspected of man-eating in the 1880s likely ate very little human flesh and mostly consumed a diet similar to herbivores and omnivores.

Humans lost body hair relatively recently in evolution.

Ancient Chinese goats evolved cashmere-producing traits due to selective breeding, particularly in genes affecting hair growth.

Researchers created small amber particles for use in bioactive and biocompatible fibers that could help with skin and hair restoration and are safe for infant clothing.

Leucaena leucocephala is nutritious but needs careful processing to remove toxins.

Adding amber particles to polyamide fibers makes them suitable for medical textiles like compression socks.

Ancient hair can preserve hormones, revealing health and fertility insights.

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

The conclusion is that recognizing hair growth cycles can improve the precision of dietary and health assessments from hair analysis.

Scalp hair sweating is a significant predictor of hair cortisol levels.

Hair treatments cause significant structural changes, especially with excessive heat, regardless of ethnicity.

New hair growth corticosterone levels are higher in diabetic mice, indicating long-term stress.

Hormone levels in hair change during pregnancy, with progesterone increasing significantly compared to non-pregnant women.

Teratoma hair is similar to scalp hair but has a rougher surface and lower adhesive force.

Shrunken heads retain some facial features and hair characteristics, allowing for limited individual identification.

The chapter explains why and how women remove unwanted hair, comparing methods like shaving and waxing.

Human hair is a significant sample for various tests in clinical, nutritional, archaeological, and forensic studies.

Hair fibers degrade and change color in very basic water.

Hair mineral analysis might help diagnose diseases early, but standard methods are needed.

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

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

The hair of two ancient Chilean mummies is well-preserved and contains high levels of heavy metals.

Mummy hair from the Taklamakan desert has calcium and phosphorus inside.

Hair elemental analysis could be useful for health and exposure assessment but requires more standardization and research.

Red fox, golden jackal, and gray wolf hairs have similar features but differ in length, thickness, and inner structure.

Bleaching damages hair by reducing the quality of keratin and keratin-associated proteins.

Body hairs can be used in forensic science and toxicology like scalp hair.