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Skin aging is due to impaired stem cell mobilization or fewer responsive stem cells.

Young adults have about 230,000 tactile nerve fibers, decreasing 5-8% per decade with age.

Postpartum depression is linked to changes in brain chemicals, inflammation, stress, and certain genes, and can potentially be identified by markers like specific steroids, serotonin levels, and vitamin D levels.

The document concludes that a better understanding of cell changes during wound healing could improve treatments for chronic wounds and other conditions.

The niche environment controls stem cell behavior and plasticity, which is important for tissue health and repair.

Vitamin D is important for skin health and may affect conditions like psoriasis and hair loss, but more research is needed to understand its role fully.

Modern science supports the use of some Ayurvedic plants for health, as ancient practices suggested.

Periodontal ligament stem cells show promise for regrowing tissues but require more research for safe, effective use.

Estrogen replacement can improve skin health in menopausal women but doesn't reverse sun damage or prevent hair loss.

Finasteride treats enlarged prostate and hair loss, but may cause side effects in some patients.

Estrogen loss during menopause worsens skin health, but hormone replacement therapy may improve it, though more research is needed.

Antibiotics can reduce acne but may lead to resistant bacteria, and understanding the skin's bacteria is important for treatment.

The conclusion is that PCOS is caused by ovarian sensitivity to hormones and disrupted hormone control, possibly due to ovarian factors, and more research is needed.

Human hair follicle organ culture is a useful model for hair research with potential for studying hair biology and testing treatments.

Trichoscopy can diagnose female hair loss with high accuracy by looking for specific patterns in hair and scalp appearance.

Coal tar shampoos, salicylic acid, and topical corticosteroids are effective for scalp psoriasis, with Vitamin D3 analogues also showing benefits; severe cases may require stronger medication with more risks.

Stress can stop hair growth in mice, and treatments can reverse this effect.

Skin problems are very common in people with systemic lupus erythematosus and important for diagnosis.

Oxidative stress contributes to hair graying and loss as we age.

The document concludes that understanding hair structure is key to diagnosing hair abnormalities and recommends gentle hair care for management.

Men generally have more severe COVID-19 cases and higher death rates than women due to biological differences.

Foxp3 is crucial for regulatory T cell function, and targeting these cells may help treat immune disorders.

Cepharanthine is a well-tolerated drug with multiple medical uses, including anti-inflammatory and anti-cancer properties.

Substances from Chinese medicines show promise for immune support and disease prevention, but the way they are processed affects their effectiveness.

Stress can cause hair loss by negatively affecting hair follicles and this effect might be reversed with specific treatments.

Janus kinase inhibitors are promising treatments for autoimmune skin diseases like eczema and psoriasis.

TRP channels in the skin are important for sensation and health, and targeting them could help treat skin disorders.

Targeting androgen receptors could be a promising way to treat skin disorders with fewer side effects.

Polycystic Ovary Syndrome likely starts in childhood and may be genetic and influenced by early hormone exposure.

The human type II 5α-reductase gene, linked to certain male health conditions, has a specific structure and low similarity to other related genes.