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Stress can cause hair loss by negatively affecting hair follicles and this effect might be reversed with specific treatments.

Hair follicles produce and respond to melatonin, affecting hair growth and sensitivity to estrogen.

Terbinafine quickly builds up in skin and hair, staying effective for over 3 weeks.

The telogen phase of hair growth is active and important for preparing hair follicles for regeneration, not just a resting stage.

Macrophages help regrow hair by activating stem cells using AKT/β-catenin and TNF.

Hair grows faster in the morning and is more vulnerable to damage from radiation due to the internal clock in hair follicle cells.

Thyroid hormones help hair grow, reduce hair loss, and increase hair pigment.

Applying a special compound can promote hair growth without harmful side effects.

Melatonin helps regulate hair growth and protects the hair follicle from stress.

Activating TRPV3 stops human hair growth.

MicroRNA-214 is important for skin and hair growth because it affects the Wnt pathway.

One minoxidil-sensitive potassium channel exists in human hair follicles.

Nerves and chemicals in the body can affect hair growth and loss.

A genetic change in the EDAR gene causes the unique hair traits found in East Asians.

Mutant CDP/Cux protein causes hair defects and reduced male fertility in mice.

Grafted rodent and human cells can regenerate hair follicles, but efficiency decreases with age.

The p75 neurotrophin receptor is important for hair follicle regression by controlling cell death.

Androgens block hair growth by disrupting cell signals; targeting GSK-3 may help treat hair loss.

Nanoparticles can improve skin treatments by better targeting hair follicles, but more research is needed for advancement.

Hair follicles greatly increase caffeine absorption through the skin shortly after it's applied.

Ozone reacts more with unwashed hair, producing compounds due to scalp oils, which could lower ozone exposure but increase exposure to reaction products.

All-trans retinoic acid causes hair loss by increasing TGF-β2 in hair follicle cells.

Prolactin affects hair growth cycles and can cause early hair follicle regression.

The document concludes that understanding the genes and pathways involved in hair growth is crucial for developing treatments for hair diseases.

The EDAR gene greatly affects hair thickness in Asian populations.

Versican, a protein, is less present in thinning hair follicles and this decrease might contribute to common hair loss in men.

Human beard hair medulla contains a unique and complex mix of keratins not found in other human tissues.

Trichoscopy is a useful non-invasive method for diagnosing different hair loss conditions.

New methods improve how we test hair growth treatments, but challenges like slow hair changes and high costs remain.

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