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.
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.
Hormone issues
Both men and women can develop hormonal imbalances that can cause hair to thin or fall out. Often, treating the imbalance helps your hair regrow. Although most people think of estrogen or testosterone when they think of a hormone imbalance, issues with your thyroid can also lead to hair thinning.
Only riboflavin, biotin, folate, and vitamin B12 deficiencies have been associated with hair loss.
HRT and Hair Regrowth
Estrogen and progesterone are hormones that aid in healthy hair growth, so when your body stops producing these, it can cause hair loss. Taking HRT can help prevent this loss and may even help regrow hair. In fact, some trans women with androgen alopecia who underwent HRT saw hair regrowth3.
Hormone Replacement Therapy (HRT) restores your body's oestrogen to an average pre-menopausal level. This treatment relieves menopausal symptoms, including hot flashes, mood swings, osteoporosis and decreased libido. It is also known to help with hair thinning.
Androgens, such as testosterone (T), dihydrotestosterone (DHT), and their prohormones dehydroepiandrosterone sulfate (DHEAS) and androstenedione (A) are the key factors in the growth of terminal hair.
It's important to understand that this is not a quick-fix for hair loss in women. The drug must be used for at least two consecutive months to notice a difference, and the effect is usually noticed around the four-month mark, but it could possibly take longer. A six to 12-month trial is recommended.
It depends on your situation. Not all women need, want or are candidates for estrogen therapy. Estrogen can reduce menopausal symptoms like hot flashes, night sweats and vaginal dryness. If you have a uterus, you'll likely need to take progesterone along with the estrogen.
The female sex hormone oestrogen makes body hair fine and soft. Androgens are male sex hormones, including testosterone, which are responsible for masculine characteristics such as facial hair and coarse body hair. A woman's ovaries and adrenal glands naturally make a small amount of androgens.
Hair loss can also be triggered by hormone changes that occur during menopause. During menopause women's estrogen and progesterone levels drop causing hair to grow more slowly and become thinner.
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.
Hormone replacement therapy (HRT)
HRT is used to increase your body's natural hormone levels. Your doctor may recommend HRT if you're approaching menopause. Menopause causes your estrogen and progesterone levels to significantly decrease. HRT can help return these levels to normal.
Is menopausal hair loss permanent? The good news: hormonal hair loss can grow back after menopause. But before we get to that, it's important to know that hair goes through cycles of hair shedding and hair regrowth throughout our lives — on average, people usually lose between 50 and 100 strands of hair a day.
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.
Causes of Low Estrogen Levels
Excessive exercise. Thyroid conditions. Pituitary gland dysfunction. Anorexia, bulimia, or other eating disorders.
Too little estrogen can lead to a low sex drive. Too much of it can cause infertility and erectile dysfunction. Excessive estrogen can cause gynecomastia, or enlarged breasts.
Suddenly thinning hair could be caused by a variety of reasons, such as a period of extreme stress, pregnancy, discontinuing birth control pill use, hormonal changes, a high fever, or pulling at your hair.