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Aging mice have slower hair regeneration due to changes in signal balance, but the environment, not stem cell loss, controls this, suggesting treatments could focus on environmental factors.

Zinc deficiency in children can cause skin issues and can be serious if not diagnosed and treated properly.

LGR5 helps maintain corneal cell characteristics and prevents unwanted changes by controlling specific cell signaling pathways.

Short-chain fatty acids from *Cutibacterium acnes* cause skin inflammation, contributing to acne.

Advanced human skin models improve drug development and could replace animal testing.

The FOXN1 gene is crucial for developing immune cells and preventing immune disorders.

Women with PCOS have fewer activated T cells in their ovarian follicles, which might affect fertility.

The nude gene causes skin cell overgrowth and improper development, leading to hair and urinary issues.

Red ginseng may improve immunity, fatigue, memory, blood circulation, and menopausal symptoms, and is generally safe to consume.

Stress can worsen skin conditions by affecting hormone levels and immune response.

The document concludes that for hair and feather growth, it's better to target the environment around stem cells than the cells themselves.

New findings explain how genetic changes, body clocks, and certain molecules affect tissue response to stress hormones.

PPAR agonists show promise for skin conditions but need more research before being a main treatment.

EdnrB signaling helps melanocyte stem cells regenerate and could be targeted to treat pigmentation issues.

Smad-4 and Smad-7 are key in hair follicle development, with other Smads being less important.

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

Tcf3 helps cells move and heal wounds by controlling lipocalin 2.

New methods to improve the healing abilities of mesenchymal stem cells for disease treatment are promising but need more research.

Skin tumor regression is helped by retinoic acid signaling blocking Wnt signaling.

Disrupting Stat3 in hair follicle stem cells greatly reduces skin tumor formation.

The conclusion is that genetic changes in the glucocorticoid receptor can lead to conditions affecting stress response, immunity, and metabolism, requiring personalized treatment.

Bcl-2 overexpression protects against UVB damage but worsens hair loss from chemotherapy.

Hoxc genes control hair growth through Wnt signaling.

Stem cells have great potential for improving wound healing, but more research is needed to find the best types and ways to use them.

TGF-β2 plays a key role in human hair growth and development.

Hair follicle regeneration possible, more research needed.

Autophagy is important for human hair growth and health.

Women with PCOS often have mood disorders and a lower quality of life, and treatment should focus on both physical and mental health.

Distinct β-catenin patterns are linked to cell growth, not cell death, in lung cancer.

Some alternative treatments for hair loss might work, but more research is needed.