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Hormones, especially androgens, play a key role in acne, which can be a symptom of systemic diseases like PCOS and may require targeted treatment.

New LPA receptors (LPA4, LPA5, LPA6) have diverse roles in the body.

Hair growth is influenced by interactions between skin layers, growth factors, and hormones, but the exact mechanisms are not fully understood.

PLGA-based microneedles are promising for safe and effective skin delivery of drugs and vaccines.

Male pattern hair loss caused by follicular miniaturization; early diagnosis and treatment can reduce psychological burden.

Products should be called 'sperm-safe' only after thorough, well-designed tests.

Human liver cells stick to hair protein materials mainly through the liver's asialoglycoprotein receptor.

Prolactin may play a significant role in skin and hair health and could be a target for treating skin and hair disorders.

Ice-skating athletes often have skin problems due to cold, infections, and inflammation, needing careful treatment and prevention.

Keratin peptides can change hair shape gently without harsh chemicals.

Researchers found a way to create cells from stem cells that act like human cells important for hair growth and could be used for hair regeneration treatments.

Microneedle arrays with nanotechnology show promise for painless drug delivery through the skin but need more research on safety and effectiveness.

Tooth regeneration could become possible by controlling how and when bioactive factors are released.

Neurosteroids change how GABA_A receptors work in the brain, which could be important for treating temporal lobe epilepsy.

ALA-PDT is effective and safe for chronic X-ray dermatitis, providing complete or partial remission.

Two specific hair keratin genes are active during hair growth and decline as hair transitions to rest.

Black women's unique hair characteristics and styling practices can lead to specific scalp conditions, which require early diagnosis and appropriate treatment.

Most hair loss in children is caused by a few common conditions, and it's important to diagnose these properly and support the child's mental health.

Hair can regrow in large wounds through a process similar to how hair forms in embryos, and understanding this could lead to new treatments for hair loss or scarring.

Scalp hair grows at 0.37 mm/day, forearm hair at 0.18 mm/day, and thigh hair at 0.30 mm/day, with no significant differences found in people with certain hair conditions.

17α-estradiol is a safe estrogen that might protect the brain and doesn't cause feminization, needing more research for treating brain diseases.

The study found no common cause for a girl's crystalline cataract and uncombable hair, suggesting their co-occurrence might be coincidental.

Researchers found a new gene, hacl-1, that is active in mouse hair follicles during hair growth and may be important for hair biology.

The document concludes that understanding hair follicles requires more research using computational methods and an integrative approach, considering the current limitations in hair treatment products.

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

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

Certain molecules in hair change with age and could be used for cosmetic treatments.

The document concludes that clinicians should be aware of common hair and scalp disorders in women of African descent and that more research is needed to develop effective treatments.

New treatments for hair loss may target specific pathways and generate new hair follicles.