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Mouse hair follicle cells briefly grow during the early hair growth phase, showing that these cells are important for starting the hair cycle.

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

Over one-third of women experience hair loss, with female-pattern hair loss being most common, and treatments include minoxidil and possibly hair transplantation.

African Americans have less hair density than whites.

Obesity is linked to various skin problems and may increase the risk of skin cancer.

The skin's internal clock affects healing, cancer risk, aging, immunity, and hair growth, and disruptions can harm skin health.

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

Choosing the right patients, using proper techniques, and having thorough knowledge are key to preventing and managing dermal filler complications.

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

The conclusion is that FFA and LPP have similar scalp biopsy features, making them hard to distinguish histologically, and FFA may be a specific kind of scarring hair loss.

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

Isotretinoin effectively treats severe acne and similar conditions, but has common, mostly reversible side effects, requiring careful patient monitoring.

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

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

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

Finasteride effectively treats baldness but may cause sexual side effects.

Fat cells in the skin help start healing and form important repair cells after injury.

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

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

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 document describes how to tell different types of non-scarring hair loss apart by looking at hair and scalp tissue under a microscope.

Finasteride exposure in pregnancy causes genital abnormalities in male rats.

No single treatment is consistently effective for alopecia areata, and more research is needed.

Male hormones like testosterone may make COVID-19 worse, and testing for sensitivity to these hormones could help predict how severe a patient's symptoms might be. Treatments that reduce these hormones are being explored.

Many women in southern China have polycystic ovary syndrome, with some symptoms differing from Western women.

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

Higher doses of cranial irradiation are linked to permanent hair loss.

Asia has made significant progress in tissue engineering and regenerative medicine, but wider clinical use requires more development.

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.