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Alopecia areata is an autoimmune disease causing patchy hair loss, often with other autoimmune disorders, but its exact causes are unknown.

Finasteride safely lowers DHT levels without affecting testosterone.

The WNT signaling pathway is important in many diseases and targeting it could offer new treatments.

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.

Protoporphyrin IX is useful in cancer treatment but can cause health problems if not properly regulated.

Eating less sugar, milk, and saturated fats and more vegetables and fish may help treat and prevent acne.

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

The document recommends using both clinical evaluation and various measurement methods to assess skin greasiness, considering factors like temperature and hormones.

Some vitamins and minerals like vitamin D and iron can help with certain types of hair loss, but more research is needed for others.

Fat-derived stem cells show promise for skin repair and reducing aging signs but need more research for consistent results.

Obesity worsens PCOS symptoms, and PCOS may lead to more weight gain; managing both requires a holistic approach that includes mental health.

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

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

Finasteride effectively treats baldness but may cause sexual side effects.

Testosterone's muscle-building effects do not require its conversion to DHT.

Men's sensitivity to male hormones might affect how severe COVID-19 gets for them.

MicroRNA-302 helps improve the conversion of body cells into stem cells by blocking NR2F2.

The telogen phase of hair growth is active and important for preparing hair follicles for regeneration, not just a resting stage.

Understanding how cells die in the skin is important for treating skin diseases and preventing hair loss.

Vitamin D has potential benefits for cancer prevention, heart health, diabetes, obesity, muscle function, skin health, and immune function, but clinical results are mixed and more research is needed.

The article concludes that the wool follicle is a valuable model for studying tissue interactions and has potential for genetic improvements in wool production.

Adult female acne treatment should be personalized, considering individual preferences and pregnancy, using various topical and oral medications while managing side effects and resistance.

Children with atopic dermatitis often have sleep problems, affecting their growth and behavior.

Androgens have complex effects on hair growth, promoting it in some areas but causing hair loss in others, and our understanding of this is still evolving.

People with PCOS, especially if obese, often have NAFLD, linked to obesity, insulin resistance, and high androgen levels.

Aminopterin strongly suppresses epithelial tissues and can treat certain skin conditions but has significant side effects.

Men, especially older ones with health issues like prostate cancer, may have worse COVID-19 outcomes and could benefit from therapies targeting male hormones.

Animals that change color with the seasons mainly do so in response to daylight changes, but climate change is causing camouflage problems that may require evolutionary changes.

Cyproterone acetate-estrogen most effective for hirsutism, but consider side effects and patient needs.

Hair, teeth, and mammary glands develop similarly at first but use different genes later.