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Both a lock of hair and a single hair strand can show chronic drug use, but at least six single hairs are needed for accurate results.

Coconut oil makes hair stronger and more flexible than mineral oil.

Curly hair's strength and flexibility vary with moisture and temperature.

Animal hair fibers like wool and mohair are strong when dry, but vicuna fibers are very brittle.

The research found that twisting hair fibers can show changes in stiffness and damage, and help tell apart different hair treatments.

Cosmetic treatments like bleaching and perming can greatly reduce opiate levels in hair, possibly leading to false-negative drug tests.

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

The KRTAP15-1 gene affects cashmere fiber thickness in goats.

The EDAR gene greatly affects hair thickness in Asian populations.

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

Certain genes are linked to the quality of cashmere in goats.

The article concludes that developing in vitro models for human hair structures is important for research and reducing animal testing, but there are challenges like obtaining suitable samples and the models' limitations.

Different hair types from various ethnic groups affect hair shine due to characteristics like thickness and shape.

The conclusion is that a new method to measure hair shine was confirmed to match people's visual assessments.

The KRT84 gene is linked to better wool quality in Gansu Alpine Fine-wool sheep.

The document suggests that nerve issues might contribute to hair loss and that testing sensation could predict these nerve problems.

Chemical hair straighteners can severely damage hair and scalp with repeated use.

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

A single robotic system can accurately harvest and implant hair grafts, showing promise for real-world use.

Scientists created 3D hair-like structures that could help study hair growth and test treatments.

Artificial hair implants can still cause side effects despite improvements.

Two mutations in KRT74 and EDAR genes cause sheep to have finer wool.

A new method can quickly and accurately detect drugs in hair.

The gene KAP22-1 affects wool yield and fiber shape in sheep.

The IRF2BP2 gene affects sheep fleece quality by influencing fiber traits.

Nude mice with grafted human skin developed scars similar to human hypertrophic scars.

Organoid technology is improving personalized medicine by better predicting drug responses and treatments.

Zinc supplements improved symptoms in a Uyghur infant with a rare genetic disorder affecting zinc absorption.

APA is a promising new compound for repairing damaged hair, outperforming Olaplex® in strength and elasticity.

Pectin biosynthesis is essential for the growth of cotton fibers and Arabidopsis root hairs.