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Old people have less hair because their hair follicles don't regenerate as well, not because of fewer stem cells, and a protein called follistatin might help reactivate hair growth.

Different hair and nail conditions can indicate health issues and have specific treatments; accurate diagnosis is crucial before treatment.

Minoxidil improves blood flow and vessel flexibility, potentially helping with vascular stiffness.

Telogen effluvium is a reversible hair loss condition that requires a detailed diagnosis and often resolves on its own.

Eating fewer calories improves the ability of stem cells to repair and renew the body in various tissues.

Children with HIV often have skin problems that can indicate the severity of their immune system damage.

The effects of estrogen on human scalp hair growth are unclear and need more research.

Delayed ejaculation is a complex issue caused by psychological, biological, and lifestyle factors, requiring a holistic treatment approach.

Cellular senescence has both cancer-blocking and cancer-promoting effects, and targeting senescent cells may improve health and lifespan.

TLR4 is important in aging-related diseases and could be a new treatment target.

Sensory neuron remodeling and Merkel-cell changes in the skin happen independently.

Sensory neuron and Merkel cell changes in the skin happen independently during normal skin maintenance.

Smoking doubles the risk of blindness, and physical exercise helps dyslexic children read better.

Hair ages due to genetics and environmental factors, leading to graying and thinning, with treatments available for some conditions.

Aging reduces skin stem cell function, leading to changes like hair loss and slower wound healing.

Lamivudine might reverse hair graying and needs more research for potential treatments.

PCOS is a common condition in women that can lead to infertility and other health issues, and it's diagnosed by specific criteria with various treatment options available.

Using a patient's own tissue for browlifting can improve both the position and fullness of the brow for a longer-lasting rejuvenation.

Mohamed Kandil suggests renaming Polycystic Ovary Syndrome to "Polyfollicular Anovulatory Androgenic Syndrome" to better describe its symptoms, but concerns exist that it may not cover all related issues like obesity and depression.

Men with Kennedy disease have less chance of hair loss.

Stress from being transgender is linked to higher blood pressure at night and more inflammation, which may affect heart health.

Telomere damage affects skin and hair follicle stem cells by messing up important growth signals.

Finasteride doesn't negatively affect sexual function in Indian men with hair loss.

Eating less can improve stem cell function and increase lifespan.

The JAK/STAT pathway is important in cell processes and disease, and JAK inhibitors are promising for treating related conditions.

Stress increases a factor in mice that leads to hair loss, and blocking this factor may prevent it.

Environmental factors, hormones, nutrition, and stress all significantly affect skin health and aging.

The document concludes that modern ocular cosmetics enhance beauty and eyelash health, with safe practices and regulations being important.

Finasteride 5 mg effectively reduces urinary symptoms and PSA levels in men with enlarged prostates, with few sexual side effects.

Tetracycline can stick to hair follicles and potentially cause hair loss.