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Human hair follicle stem cells can turn into multiple cell types but lose some of this ability after being grown in the lab for a long time.

The conclusion is that recognizing hair growth cycles can improve the precision of dietary and health assessments from hair analysis.

HFMs can help study hair growth and test potential hair growth drugs.

Human hair follicles produce and respond to erythropoietin, helping protect against stress.

Human hair follicle cells can grow hair when put into mouse skin if they stay in contact with mouse cells.

Injected human hair follicle cells can create new, small hair follicles in skin cultures.

Hair analysis for drugs needs a better understanding of how drugs enter hair, considering factors like hair structure and pigmentation.

Hair problems can be caused by genetics or the environment, and treatment should focus on the cause and reducing hair damage.

Lipophilic dyes accumulate more in hair follicles when delivered with surfactant-propylene glycol solutions.

Hair proteins have weak spots in their α-helical segments.

Human hair has a protective lipid layer that can be damaged by moisture and treatments, affecting hair growth and health.

The article concludes that developing in vitro models for human hair structures is important for research and reducing animal testing, but there are challenges like obtaining suitable samples and the models' limitations.

Scalp hair follicle culture has limits for testing minoxidil's hair growth effects.

GMG-43AC may help reduce unwanted hair growth and treat certain hair loss conditions.

Choosing hair follicles at the same growth stage leads to more consistent hair growth experiments.

Human hair has a new region with ordered filaments and the cuticle contains β-keratin sheets.

Finasteride helps hair growth by decreasing cell death in hair follicles.

Finasteride affects hair growth by changing caspase and XIAP levels, potentially treating hair diseases.

Korean Red Ginseng may protect against hair loss caused by chemotherapy.

Human hair has more unsaturated fats inside than on the surface, and certain lipids may help bind the outer and inner layers together.

Stem cells can help regenerate hair follicles.

The document concludes that immune system abnormalities cause alopecia areata, but the exact process is still not completely understood.

Growing hair cells with dermal cells can potentially treat hair loss.

An apple-based supplement was found to stimulate hair protein production, which may help with hair growth.

The upper half of a human hair follicle can grow a new hair in a mouse, but success is rare.

Hair microscopy is useful for diagnosing hair disorders, but clear definitions are needed for accurate genetic analysis.

A tough membrane between the outer and inner layers of human hair protects it from damage.

Storing hair follicles in special buffers with added protective substances can increase hair growth and reduce cell death.

Human hair grows better in a special gel that mimics skin.

A hair-growth formula with cystine and thiamin helps protect skin cells against UV damage and improves their growth.