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Feathers are useful for researching growth, regeneration, and the effects of treatments like chemotherapy on hair loss.

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

Male pattern baldness is mainly caused by a hormone called dihydrotestosterone (DHT), and drugs that can block this hormone might help prevent hair loss.

5α-reductase is essential for male sexual development and its inhibitors have potential in treating various conditions related to hormone action.

Taking hormonal contraceptives can cause skin changes, including hair loss, due to the effects of synthetic sex hormones.

Prolactin affects hair growth cycles and can cause early hair follicle regression.

Melatonin and mitotane treatment led to hair re-growth in 62% of dogs with Alopecia X, but this was not always linked to normal hormone levels.

Beard cells, unlike scalp cells, produce growth factors in response to testosterone, which may explain differences in hair growth.

The exact cause of growth hormone-responsive alopecia in dogs is unclear.

Monkeys with hair loss during pregnancy showed higher stress hormone levels and invested differently in their offspring.

Hair growth is influenced by hormones and goes through different phases; androgens can both promote and inhibit hair growth depending on the body area.

Adiponectin may stimulate hair growth and could be a potential treatment for promoting hair growth.

Bee venom helps hair grow and may work better than some common treatments.

Stress hormone CRF can cause hair loss by affecting hair growth cells and hormones.

Birth control pills help treat skin and hair growth problems linked to high male hormone levels.

Gender affects hair and scalp characteristics, with differences in hormone responses, graying patterns, and trace metals.

Estrogens generally inhibit hair growth and improve skin quality, but their exact effects on hair follicles are complex and not fully understood.

Most treatments for hair loss in 1997 were not effective for most people, and maintaining hair growth was difficult.

Melatonin helps regulate hair growth and protects the hair follicle from stress.

Hair loss in Androgenetic alopecia (AGA) is due to altered cell sensitivity to hormones, not increased hormone levels. Hair growth periods shorten over time, causing hair to become thinner and shorter. This is linked to miscommunication between cell pathways in hair follicles. There's also a change in gene expression related to blood vessels and cell growth in balding hair follicles. The exact molecular causes of AGA are still unclear.

Minoxidil, a common hair loss treatment, might work by counteracting a hormone that reduces hair growth and promotes hair loss.

Excessive hair growth can be assessed by history, exam, and blood tests, and treated with medication like dexamethasone, birth control pills, and spironolactone.

Androgens can both stimulate and cause hair loss, and understanding their effects is key to treating hair disorders.

Hair ages due to various factors and treatments like minoxidil and finasteride can help, but more research and better public awareness are needed.

High levels of cortisol in hair show long-term stress which can lower fertility in animals.

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).

The article concludes that different types of hair loss require specific treatments and psychological support is important.

Excessive hair growth in women, often from high androgen levels, is usually caused by PCOS, and can be treated with hair removal, medication, and possibly weight loss.

Hirsutism in women is often due to hormone sensitivity and has significant psychological effects.

The document concludes that treatments for female hair loss and excess body hair are available, but managing expectations is important.