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Gynecomastia can be normal in newborn male babies due to exposure to estrogen from the mother, in adolescent boys going through puberty, in older men over the age of 50, and in obese men. [4] Most occurrences of gynecomastia do not require diagnostic tests.
The similarities, at molecular level, of an estrogen and a phytoestrogen allow them to mildly mimic and sometimes act as an antagonist of estrogen. [2] Phytoestrogens were first observed in 1926, [2] [5] but it was unknown if they could have any effect in human or animal metabolism.
Signs of hyperestrogenism may include heightened levels of one or more of the estrogen sex hormones (usually estradiol and/or estrone), lowered levels of follicle-stimulating hormone and/or luteinizing hormone (due to suppression of the hypothalamic–pituitary–gonadal axis by estrogen), and lowered levels of androgens such as testosterone (generally only relevant to males). [1]
Drinking beetroot juice on a daily basis could help keep heart disease at bay after menopause. Image credit: jayk7/Getty Images. This article originally appeared on Medical News Today
A dosage of two to six 100 μg/day transdermal estradiol patches can achieve mean levels of estradiol in the area of 200 to 400 pg/mL and can be used as a form of high-dose estrogen therapy, for instance to suppress testosterone levels in the treatment of prostate cancer in men and in feminizing hormone therapy for transgender women.
The Dutch sauerkraut industry found that combining a new batch of sauerkraut with an old batch resulted in an exceedingly sour product. This sourdough process is known as "backslopping" or "inoculum enrichment"; when used in making sauerkraut, first- and second-stage population dynamics, important to developing flavor, are bypassed.
Estrogen, at some concentration, has been found to be essential for male fertility/spermatogenesis. [65] [66] However, estrogen levels that are too high can impair male fertility by suppressing gonadotropin secretion and thereby diminishing intratesticular androgen levels. [60]