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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.

Hair cortisol levels can show increased stress during late pregnancy but only for up to six months.

Hair antiretroviral concentration is affected by hair type, segment position, housing, drug use, sexual behavior, kidney function, and genetics.

Segmental Vitiligo is a stable, early-onset form of vitiligo that responds well to early treatment and is ideal for repigmentation studies.

Segmental vitiligo affects hair follicle melanocytes, causing small, uniform depigmented spots.

The case suggests a possible autoimmune link between lichen sclerosus and vitiligo.

Hair test results can be misleading due to external contamination, so they shouldn't be used alone to assess long-term drug use.

Hair keratin-associated proteins are essential for strong hair, with over 80 genes showing specific patterns and variations among people.

Short telomeres may cause symptoms like hair loss and osteoporosis, offering insights into aging.

A 16-year-old boy had a rare case of Becker's nevus on his face and mouth.

Goat skin has more keratin genes, while the mammary gland has more immunity-related genes.

Topical ruxolitinib quickly improves non-segmental vitiligo.

A new method was developed to extract and analyze proteins from very short human hairs.

The study found that variations in hair protein genes are likely due to evolutionary deletions or duplications.

Understanding intermediate filaments helps explain hair health and related diseases.

Thioglycolic acid and L-cysteine change hair structure differently during perms, affecting hair strength and curling efficiency.

A 13-year-old boy with a rare genetic condition survived a heart attack and improved with treatment.

Apeiba tibourbou seed oil has analgesic and anti-inflammatory effects, making it potentially useful for food and medicine.

Chemotherapy can cause rapid, extensive hair loss, with patterns varying between individuals.

The study found that the most common repigmentation pattern in children with vitiligo is a combination of patterns, with a new medium spotted pattern identified.

The TRPV3 channel structure changes linked to severe itch and hyperkeratosis were identified using cryo-EM.

A new classification system for skin cysts was proposed to improve diagnosis.

Chemotherapy caused the patient's hair to have alternating thick and thin segments.

Pumpkin seed oil, rosemary oil, and electrotherapy showed no significant effect on hair loss.

A specific gene segment can make mouse skin cells glow, helping study hair growth and gene effects.

Hirosaki hairless rats lack hair due to missing DNA with key keratin genes.

Quantifying hair shape is better than using racial categories for understanding hair characteristics.

Human hair surface varies in wettability, showing daily and monthly patterns.

Plant-based hair care products can effectively treat hair loss with fewer side effects than synthetic treatments, and more research is needed for their development.

Epidermal growth factor increases extra hair cells in newborn rat ears.