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Aromatase (EC 1.14.14.14), also called estrogen synthetase or estrogen synthase, is an enzyme responsible for a key step in the biosynthesis of estrogens. It is CYP19A1 , a member of the cytochrome P450 superfamily, which are monooxygenases that catalyze many reactions involved in steroidogenesis .
“Testosterone doesn’t drop off like estrogen does—it goes down a linear decline,” says Casperson. “Women in their mid-40s and 50s have half the testosterone that we had in our 20s.”
Aromatase inhibitors (AIs) are a class of drugs used in the treatment of breast cancer in postmenopausal women and in men, [1] [2] and gynecomastia in men. They may also be used off-label to reduce estrogen conversion when supplementing testosterone exogenously. They may also be used for chemoprevention in women at high risk for breast cancer.
[139] [140] [141] The combination of a sufficient dosage of a progestogen with very small doses of an estrogen (e.g., as little as 0.5–1.5 mg/day oral estradiol) is synergistic in terms of antigonadotropic effect and is able to fully suppress gonadal testosterone production, reducing testosterone levels to the female/castrate range.
In both women and men, it’s normal for testosterone levels to drop with age — starting at about age 30 in men and around 40 in women. The decline doesn’t mean that it necessarily needs to be ...
Testosterone is an essential hormone for both men and women, playing an important role in muscle growth and cognitive function. Low levels of the hormone can lead to changes in mood, cognition and ...
Commercial sources for testosterone for women in the United States are limited and include the estrogen-testosterone mixture Estratest; compounding pharmacies are the main source of testosterone-only preparations for women. [24] A testosterone patch has been approved for use in the United Kingdom and European Union, but in Canada and the United ...
Antiestrogens, also known as estrogen antagonists or estrogen blockers, are a class of drugs which prevent estrogens like estradiol from mediating their biological effects in the body. They act by blocking the estrogen receptor (ER) and/or inhibiting or suppressing estrogen production .
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