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Sebocytes play a key role in controlling androgen levels in human skin.

Genetic variation in the androgen receptor gene mainly causes early-onset hair loss, with maternal inheritance playing a key role.

Stress stops hair growth in mice by causing early hair growth phase end and harmful inflammation through a specific nerve-related pathway.

Androgens may cause hair loss by increasing TGF-beta1 from scalp cells, which inhibits hair cell growth.

Finasteride treats enlarged prostate and may help with baldness, but effects on sexual function and male fetuses are unclear.

COVID-19 can cause different skin symptoms that may help with early diagnosis and show how severe the disease is.

Estrogens significantly influence hair growth by interacting with receptors in hair follicles and may help regulate the hair growth cycle.

Male pattern baldness involves genetics, hormones, and needs better treatments.

Guidelines for diagnosing common hair loss include detailed history, clinical examination, and various diagnostic techniques.

Different types of polycystic ovary syndrome (PCOS) have varying severity, with Type I being the most severe and common.

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.

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

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

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

Inflammation may be linked to hair loss, and targeting specific enzymes could help treat it.

Estrogen Receptor ß (ERß) is the main hormone controller in human skin and hair follicles, not Estrogen Receptor α (ERα) or the Androgen Receptor (AR).

Prolactin contributes to hair loss by promoting hair follicle shrinkage and cell death.

Low doses of some substances can be beneficial, while high doses can be harmful or toxic.

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.

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

Male pattern baldness involves hormones and cell signals affecting hair growth.

Hair follicles produce and respond to melatonin, affecting hair growth and sensitivity to estrogen.

Estrogens help reduce skin aging, and SERMs might offer similar benefits without the risks of hormone therapy.

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.

Modern lifestyles, including poor diet, stress, and long-term use of certain medications, hinder the body's ability to heal from inflammation, leading to chronic diseases.

Potassium channel openers are effective in treating heart conditions, high blood pressure, pulmonary diseases, bladder issues, and hair loss, but more selective drugs are needed.

Hormones, especially androgens, play a big role in acne, but most acne sufferers don't have a hormone disorder. Hormonal treatments, including birth control pills, can be very effective for women whose acne doesn't improve with regular treatments.

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

The document concludes that hair is complex, with a detailed growth cycle, structure, and clinical importance, affecting various scientific and medical fields.