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Brain-Derived Neurotrophic Factor (BDNF) slows down hair growth and promotes hair follicle regression.

Biotin supplements are not proven to improve hair or nails and may interfere with medical tests.

Melatonin improves cashmere goat hair growth and quality by increasing antioxidants and reducing cell death.

Moisture content significantly affects how human hair breaks.

Senescent melanocytes can boost hair growth by activating hair stem cells.

Coating surfaces with human hair keratin improves the growth and consistency of important stem cells for medical use.

Light scatters differently from elliptical hair fibers than from circular ones, and a new model better predicts this behavior, especially for shiny highlights.

Adding fetal calf serum helps Merkel cells survive and change shape.

The cuticle significantly contributes to hair stiffness, making up about 60% of the total bending stress.

Bleaching hair increases cysteic acid levels in a predictable way.

The document concludes that periocular hair disorders have various causes and treatments, and proper evaluation by specialists is important for management and prognosis.

A protein called FERONIA helps control root hair growth in response to cold and low nitrogen by activating nutrient-sensing pathways in a plant called Arabidopsis.

More research is needed to understand how nutrients affect root hair growth.

The new hair straightening method keeps hair straight permanently by using specific creams and heat.

TRP-hair essence protects hair from heat damage, maintains color, and strengthens hair.

A gene network led by RSL4 is crucial for early root hair growth in response to cold in Arabidopsis thaliana.

Finasteride shows promise for female hair loss, but more research needed.

Both methods improve hair density and thickness; double-spin may be more effective.

Experts suggest various surgical methods for hair restoration, including scalp reduction, transplantation using minigrafts, and establishing a permanent frontal hairline with follicular units. The drug finasteride may also be used alongside these procedures.

PRP can boost hair growth and thickness, especially in early stages of hair loss, but its effectiveness varies and there's no set method or treatment frequency. Stem cells also show promise for increasing hair density.

Permanent waving weakens hair by altering its protein structure.

The method accurately measures hair damage and strength, revealing effects of cosmetics and metal correlations.

Microfibrils are key for permanent waves, and hydrolyzed keratin improves wave formation and hair condition.

Papain and bisulfite break down human hair by dissolving parts of it.

Restoring mitochondrial function in mice reversed their skin wrinkling and hair loss.

Micro-segmental hair analysis helps detect drug use patterns and estimate drug consumption days.

Loose Anagen Syndrome causes easy-to-pull, thin hair, mainly in young girls, and improves with age.

t-Flavanone may help hair growth by reducing a specific protein's activity in skin cells.

DTDG in hair treatments reduces damage and preserves hair structure.

Blocking autophagy increases survival of inner ear hair cells exposed to gentamicin.