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The document concludes that periocular hair disorders have various causes and treatments, and proper evaluation by specialists is important for management and prognosis.

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.

Radiotherapy can cause rare changes in hair color, which should be discussed with patients.

Chinese patients have fewer hair follicles than Caucasians, and transplanting hair at 40% of normal density works for natural-looking hairlines.

Chinese scalps have fewer hair clusters than Caucasians, and transplanting 30 clusters per square centimeter creates a natural-looking hairline for bald Chinese individuals.

Aging causes hair to gray and thin, with the timing of graying varying by race, and factors like oxidative stress and genetics can lead to hair loss.

Healthy scalp reduces hair loss by managing oxidative stress.

Transplanted hair follicles can resist hair loss from an autoimmune condition better than natural hair.

Detailed patient history and physical exams are crucial for diagnosing hair loss.

Balding men had lower bone density, while balding women had higher hip bone density.

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

UV exposure causes hair thinning, graying, and changes in hair growth cycles in mice.

The document concludes with the creation of a Hair Transplant Foundation after reviewing the early hair transplant techniques and discussions from a forum.

Stem cell therapies could be a promising alternative for hair loss treatment, but more research is needed to understand their full potential and safety.

Hormones and neuroendocrine factors control hair growth and color, and more research could lead to new hair treatment options.

SA linked to mitochondrial issues and oxidative stress, while AGA involves disrupted hair growth genes.

Videodermoscopy better identifies female hair loss than clinical diagnosis.

The document concludes that careful evaluation is key to diagnose and treat women with hair loss, with tests for thyroid, iron, and hormones as needed.

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

TGF-β signaling is crucial for stem cell maintenance, differentiation, and has implications for cancer treatment.

IL-2 treatment causes skin eruptions and other reversible side effects, and may play a role in psoriasis.

Testosterone therapy seems safe for postmenopausal women for a few years, but more research is needed for long-term effects.

Fat cells are important for healthy skin, hair growth, and healing, and changes in these cells can affect skin conditions and aging.

Stump-tailed macaque best for researching hair loss causes and treatments.

Low-level laser therapy significantly increases hair density in adults with hair loss, with low-frequency treatment being more effective.

Some skin diseases and their treatments can negatively affect male fertility.

The document concludes that treating androgen excess needs patience, managing expectations is important, and many drugs used are not officially approved, suggesting cosmetic options for mild cases.

Female pattern hair loss is different from male pattern hair loss and has unclear genetic causes.

Valproate can cause hair loss and changes in hair appearance, but may help regrow hair when applied topically.

Hamilton scale imprecise, hair shaft diameter decreases, stem cell transplant regrows hair, ECP ineffective for alopecia areata universalis.