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Men's hair loss is caused by hormones and genes, and can be treated with medication and surgery, while graying is due to aging and has no prevention except dyeing.

Bariatric surgery may help severely obese teenagers but has risks and requires careful patient selection and long-term care.

Early diagnosis and treatment are crucial for preventing permanent hair loss in various scalp conditions, and while new treatments are promising, more research is needed to evaluate their effectiveness.

The research found genetic differences in identical twins that could explain why one twin has a disease while the other does not.

Trichoscopy is a useful tool for diagnosing hair disorders without pulling out hair.

Dermoscopy is useful for diagnosing various skin, hair, and nail disorders and can reduce the need for biopsies.

The normal range for the hair pull test is 2 hairs or fewer, and washing or brushing hair before the test does not affect the results.

Losing eyelashes or eyebrows can be a sign of many different health problems and needs a careful approach to treat effectively.

New treatments targeting skin stem cells show promise for skin repair, anti-aging, and cancer therapy.

The review suggests younger men taking 1 mg finasteride report more side effects, including sexual, skin, metabolic, and psychological issues.

Nanoemulsion creams with certain enhancers can greatly increase caffeine delivery through skin.

Existing drug dexamethasone may lower death risk in severe COVID-19 cases; more research needed for other drugs.

Stress and alcohol affect brain chemicals differently in rats, mice, and humans, influenced by genetic differences.

Some treatments work for common baldness, but there's less evidence for other hair loss types, and more research is needed.

Skin problems like itching, dry skin, and hair loss are more common in hepatitis C patients after interferon treatment, but lichen planus is not linked to the infection.

Fractional resurfacing is safe and effective for certain skin conditions in Asian patients, but care must be taken to avoid skin pigmentation issues.

The document explains how to identify different hair problems using a microscope.

Aging alone barely affects the number of hair follicles, meaning hair loss is minimal without other conditions like androgenetic alopecia.

Premature ovarian insufficiency (POI) can harm women's sexual health, and they may benefit from hormone therapy and counseling.

FOXN1 gene mutations cause a rare, severe immune disease treatable with cell or tissue transplants.

Nanostructured lipid carriers improve minoxidil delivery for hair loss treatment.

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

Dutasteride makes alcohol less sedating and may lead to less drinking in men.

Iontophoresis improves minoxidil delivery for alopecia treatment.

Hair restoration surgery has advanced, focusing on natural results and may improve further with new techniques and therapies.

Lipedematous scalp is mainly caused by an increase in fat tissue under the skin and is different from lipedematous alopecia.

Skin organoids are a promising new model for studying human skin development and testing treatments.

β-blockers can cause skin problems like psoriasis and vitiligo, and doctors should tell patients about these risks.

Loose anagen hair syndrome is caused by structural abnormalities in the hair follicle's inner root sheath.

LPA3 is crucial for embryo implantation and links LPA to prostaglandin signaling.