Estrogen and progesterone can help keep your hair in the growing (anagen) phase. Therefore, these hormones can help your hair stay on your head longer and may even help your hair grow faster. This may be why many women notice their hair thinning starts to improve with estrogen replacement therapy.
Estrogen is related to hair growth — and hair loss. During pregnancy, for example, a woman's estrogen levels are higher than normal, which signals more hair follicles to "grow" and fewer to "rest." While estrogen levels are high, women have full, thick hair.
The answer is yes! Fortunately, unlike genetic hair loss, most hair loss caused by hormonal imbalances is reversible.
Estrogen Excess
Just like excess testosterone and excess DHT can cause hair troubles, so can too much estrogen. For some women, excess estrogen may trigger hair loss because of a gene variant that affects the functioning of an enzyme (aromatase) that processes estrogen.
Lower estrogen and progesterone levels: Estrogen and progesterone stimulate hair growth, which is why pregnant women—who are producing extra levels of these hormones—tend to experience thickening hair during their pregnancy.
When the levels of estrogen and progesterone drop, hair grows more slowly and becomes much thinner. A decrease in these hormones also triggers an increase in the production of androgens, or a group of male hormones. Androgens shrink hair follicles, resulting in hair loss on the head.
Estrogen and progesterone can help keep your hair in the growing (anagen) phase. Therefore, these hormones can help your hair stay on your head longer and may even help your hair grow faster. This may be why many women notice their hair thinning starts to improve with estrogen replacement therapy.
According to Harvard Health Publishing, topical minoxidil is the most common treatment for androgenic alopecia or hormonal hair loss as opposed to corticosteroids for non-hormonal hair loss treatment. Corticosteroids reduce inflammation and lower the immune response in alopecia areata.
DHT: The hormone behind hair loss
Dihydrotestosterone (DHT) is made from testosterone by an enzyme called 5-alpha reductase. It can also be made from DHEA, a hormone more common in women. DHT is found in skin, hair follicles, and the prostate.
Androgen Action. The role of androgen on hair growth is undeniable. However, the influence of androgen on hair follicles depends on the hair location on the body.
Androgen hormones, sometimes referred to as “male” hormones, like DHEA and testosterone, play the largest role in your overall hair growth.
In your first 6-12 months on estrogen, people on estrogen may notice changes in their body hair, facial hair, and even scalp hair. While the full effect of hair growth changes may take up to three years to develop, they are a natural part of transitioning with estrogen.
Estrogen and progesterone levels fall, meaning that the effects of the androgens, male hormones, are increased. During and after menopause, hair might become finer (thinner) because hair follicles shrink. Hair grows more slowly and falls out more easily in these cases.
In addition to keeping your bones strong, estrogen and progesterone keep your hair healthy. A decrease in these hormones causes an increase in androgen production which causes hair follicles to shrink and contribute to hair loss.
How is female hair loss treated? Minoxidil (Rogaine) 5% is the only topical medication approved by the FDA for female-pattern hair loss. The once daily use foam treatment regrows hair in 81% of the women who try it. Liquid options of 2% and 5% solutions are available over the counter.
Irregular periods, hot flashes, difficulty sleeping, mood swings, and headaches can all be signs of low levels of the hormone estrogen in women. The most common cause of low estrogen is perimenopause, your body's transition into menopause, but other factors can be involved.
A Fred Hutchinson Cancer Research Center study involving postmenopausal, overweight, and obese women who took 2,000 IUs of vitamin D daily for a year found that those whose vitamin D blood levels increased the most had the greatest reductions in blood estrogens, which are a known risk factor for breast cancer.
Only riboflavin, biotin, folate, and vitamin B12 deficiencies have been associated with hair loss.