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Sex hormones and antiandrogens can either stimulate or inhibit human hair follicle cell growth depending on the dose.

Extracts from Alnus sibirica and oregonin may help with hair growth and prevent hair loss.

Baldness in men with prostate cancer is linked to higher levels of certain sex hormones, but chest hair density is not.

Hair follicles and deer antlers regenerate similarly through stem cells and are influenced by hormones and growth factors.

The tobacco leaf extract may help hair grow and could treat hair loss.

Testosterone is important for male sexual traits, reproduction, muscle and bone health, blood production, and metabolism, and works both directly and after being changed into other hormones.

Testosterone may worsen hair loss by affecting hair growth signals, while different prostaglandins can either hinder or promote hair growth.

Testosterone patches can modestly improve sexual function in postmenopausal women not on estrogen therapy.

Hormone levels in hair vary across the head, with the highest concentration of a key hormone linked to hair loss at the top.

Hair loss causes differ between men and women due to changes in hormone levels and inflammation-related pathways.

Androgens play a key role in hair growth and disorders like baldness and excessive hairiness.

High prolactin levels can cause skin and hair symptoms similar to those caused by hormone imbalances.

Brassica oleracea extract, glucosinlates, and sulforaphane can boost hair growth and might be used to treat hair loss.

A teenage girl had both a rare ovarian tumor and a severe form of polycystic ovarian syndrome.

Saw palmetto in hair products might reduce hair loss but can cause side effects.

High testosterone levels in 20% of the women studied may indicate PCOS, while 80% had low levels with potential health impacts.

The woman's surgery lowered her testosterone and improved scalp hair loss but did not change her excessive body hair.

A rare ovarian tumor caused high testosterone, hair loss, and missed periods, but surgery fixed these issues and led to pregnancy.

A boy with GAPO syndrome had hair loss similar to male pattern baldness without hormone issues, possibly due to skin or blood vessel problems.

Adiponectin reduces inflammation and bone loss in joint replacements.

Leydig cell tumors can cause high testosterone and symptoms like hair loss in postmenopausal women, but surgery can improve these symptoms.

Licorice extract helps hair growth and may treat hair loss.

Androgenetic alopecia can be treated with minoxidil and finasteride, requiring long-term use and patient cooperation.

Testosterone therapy in transgender men can lead to hair loss, with the risk increasing over time and influenced by family history.

The paper concludes that animal models help in understanding hair loss causes and developing new treatments.

Low ferritin and Vitamin D levels may cause hair loss after COVID-19.

Finasteride niosomes were developed and found to be effective in treating hair loss, with better results than commercial minoxidil, and could be a promising topical treatment for hair loss.

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

Early-stage male pattern baldness shows two types of hair loss: one on the top of the head linked to hormonal changes, and another at the back of the head. The top hair loss responds well to specific treatment, while the back hair loss does not.

Hair transplants help transgender patients look more like their gender identity, with different procedures for trans women and men.