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

Women look young for their age due to larger lips, less sun damage, and genes that prevent gray hair and wrinkles.

Electrolysis is effective for permanent hair removal, but technique is key to avoid scarring, and sometimes hormonal treatment is needed for women with hirsutism.

Eflornithine cream effectively reduces women's unwanted facial hair but hair returns if treatment stops.

Ruby laser pulses best destroy hair follicles during the growth phase and effectiveness varies with laser intensity; melanin is key for targeting, and timing treatments can improve results.

Testosterone treatment in trans men increases body and facial hair and may lead to hair loss over time, but severe skin issues are rare.

PRP injections improve hair thickness for baldness.

Researchers found that hair shedding happens mostly when new hair is growing and involves a unique process.

Type 2 diabetes, bacterial scalp infections, and tight hairstyles like braids and weaves are linked to a higher risk of a scarring hair loss condition in African American women.

How bad a woman's hair loss is doesn't always match how it affects her happiness and daily life.

ADSC-CM treatment improved hair density and thickness in women with hair loss, safely and effectively.

Mice without the vitamin D receptor gene lose hair due to disrupted hair follicle cycles.

Some African American women's central scalp hair loss is linked to genetics and past fungal scalp infections, with more research needed on other causes.

Minoxidil helps hair cells live longer and grow longer.

Women with PCOS have higher androgen levels that decrease with age but are still higher than in women without PCOS.

Hair growth can be induced by certain cells found at the base of hair follicles, and these cells may also influence hair development and regeneration.

Some chemotherapy can cause permanent hair loss.

Women with acromegaly often have irregular periods due to hormone imbalances and growth hormone effects.

Women with excess body hair feel psychological distress influenced by societal beauty standards, but distress isn't directly linked to the amount of hair.

Hair usually grows back 1-3 months after treatment for anagen effluvium, and children with Loose Anagen Hair Syndrome often improve by adolescence.

Caucasian women's hair appears thickest in their 20s, with perceived thinning after mid-30s due to both decreasing density and diameter.

Lower levels of certain brain chemicals are linked to worse PTSD symptoms in men.

Platelet-rich plasma treatment can significantly increase hair count and density in men with pattern baldness, and these improvements can last up to 3 months.

Cyclosporin A helps mice grow hair by blocking a specific protein activity in skin cells.

The study suggests smoking is common in HS patients but its role is unclear, and more research is needed to understand HS causes.

Alopecia in captive rhesus macaques is affected by season, sex, age, housing, and stress, with complex links between stress hormones and hair loss.

The control system for hair growth cycles is not well understood and needs more research.

Mothers and newborns with dental fillings had higher mercury in their hair, but getting fillings during pregnancy didn't raise mercury levels further.

Topical vitamin D3 does not prevent hair loss from chemotherapy.

Plasmacytoid dendritic cells are a key factor in causing hair loss in alopecia areata and could help differentiate it from other hair loss conditions.