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

Eclipta alba extract may help hair grow similarly to Minoxidil.

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.

Mutations in three genes cause Uncombable Hair Syndrome, leading to frizzy hair that can't be combed flat.

Nanoparticles can deliver vaccines through hair follicles, triggering immune responses and providing protection.

Finasteride and minoxidil are effective for hair regrowth, while treatments for alopecia areata have varying success and continuous treatment is necessary.

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

Red light therapy at 655 nm significantly improved hair growth in men with hair loss.

Human hair's strength and flexibility vary by ethnicity, damage, and treatment.

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

Hair loss occurs due to fewer papillary cells, smaller follicles, and shorter growth phases.

Trichohyalin is a protein in hair follicles that helps form hair filaments.

Androgens have complex effects on hair growth, promoting it in some areas but causing hair loss in others, and our understanding of this is still evolving.

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

Different ethnic groups have unique hair growth patterns, with African hair growing slower and less dense, Asian hair growing fast but sparse, and Caucasian hair being densest; men are more likely to experience hair loss than women.

Minoxidil increases hair weight and count temporarily in men with hair loss.

Some drugs can cause skin, nail, and hair problems, which are important for healthcare professionals to recognize and report.

Tiny particles from stem cells help activate hair growth cells and encourage hair growth in mice without being toxic.

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

Ruby laser pulses best destroy hair follicles during the growth phase and effectiveness varies with laser intensity; melanin is key for targeting, and timing treatments can improve results.

Thyroid hormone receptor β1 is found in human hair follicles and helps them survive.

Understanding the mouse hair cycle is crucial for cancer research.

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

Manipulating the catagen and telogen phases of hair growth could lead to treatments for hair disorders.

Hair color production is closely linked to the active growth phase of hair in mice and may also influence hair growth itself.

Analyzing trace elements in human hair is complex and needs a standardized method.

Green tea component EGCG could potentially promote human hair growth.

Trichohyalin makes hair follicles stronger.

The document concludes that hair is complex, with a detailed growth cycle, structure, and clinical importance, affecting various scientific and medical fields.