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Aging causes hair to gray and thin, with the timing of graying varying by race, and factors like oxidative stress and genetics can lead to hair loss.

The document explains the diagnosis and characteristics of woolly hair nevus and alopecia neoplastica.

Finasteride and minoxidil are effective for hair loss, but continued research is needed for better treatments.

Future hair loss treatments should aim to extend hair growth, reactivate resting follicles, reverse shrinkage, and possibly create new follicles, with gene therapy showing promise.

More dermal papilla cells in hair follicles lead to larger, healthier hair, while fewer cells cause hair thinning and loss.

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.

There are many treatments for permanent hair loss disorders, but their effectiveness varies and there's no clear best option.

Wool follicles are complex, involving interactions between different cell types and structures.

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

Latanoprost 0.1% may effectively treat hair loss.

Acne treatment varies, with topical and systemic therapies effective, and more research needed on treatment order and long-term effects.

Hair color loss can indicate the effectiveness of a drug targeting the KIT protein in mice and humans.

The document concludes that understanding and treating hair loss requires recognizing its various types and using appropriate diagnostic tools and treatments.

Assessing newborn scalp hair can reveal important health information.

Minoxidil causes excessive hair growth in almost all patients.

Hair and nail changes can indicate health issues, including cancer and side effects from cancer treatments.

SCF and c-Kit decrease in AGA hair follicles, possibly affecting hair pigmentation and growth.

Micropigmentation is a widely accepted tattooing technique for hiding cosmetic issues and medical uses, with permanent results and few side effects, but risks infection if not done with sterile tools.

Bimatoprost was found to be safer and more effective than mometasone furoate for treating scalp hair loss.

Acquired Progressive Kinking of Hair is likely an early sign of male pattern baldness.

Bimatoprost is safe but not effective for severe eyelash loss from alopecia areata, possibly helping those with less loss.

Some families have a genetic condition where they are born with irregular scalp defects.

Finasteride may help some women with hair loss, but better options exist.

Researchers found genes that control hair color and growth change before the visible coat color changes in snowshoe hares.

DNA methylation and long non-coding RNAs are key in controlling hair growth in Cashmere goats.

Bimatoprost effectively and safely improves eyebrow appearance.

UV radiation and visible light can damage hair, but there are ways to protect it.

Antler velvet hair and body hair of red deer have different structures that help with protection and insulation.

A man developed excessive hair growth after treatment with interferon-alpha and ribavirin for hepatitis C.

A substance called TCQA could potentially darken hair by activating certain genes and increasing melanin.