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Bioidentical hormone replacement therapy (BHRT), also known as bioidentical hormone therapy (BHT) or natural hormone therapy, is the use of hormones that are identical on a molecular level with endogenous hormones in hormone replacement therapy. [1]
Xenohormones and xenoestrogens are commonly used in oral contraceptives such as birth control pills and hormone replacement therapies due to their similarities to natural hormones. [ 10 ] There are many alternatives to prevent pregnancy to stop using oral contraceptives that use xenohormones such as Dropspirenone and Ethinyl Estroidal .
It has been hypothesized that plants use a phytoestrogen as part of their natural defense against the overpopulation of herbivore animals by controlling female fertility. [ 3 ] [ 4 ] 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 ]
[7] [5] [6] Estradiol acetate is an estrogen and hence is an agonist of the estrogen receptor, the biological target of estrogens like estradiol. [8] [9] It is an estrogen ester and a prodrug of estradiol in the body. [9] [8] Because of this, it is considered to be a natural and bioidentical form of estrogen. [9] [10]
The natural estrogen used in this study was similar to the one used in the formulation for the NOMAC-E2 Combined Oral Contraceptive, known as Zoely, and produced by the pharmaceutical company Merck.
Xenoestrogens are a type of xenohormone that imitates estrogen.They can be either synthetic or natural chemical compounds.Synthetic xenoestrogens include some widely used industrial compounds, such as PCBs, BPA, and phthalates, which have estrogenic effects on a living organism even though they differ chemically from the estrogenic substances produced internally by the endocrine system of any ...
Estradiol benzoate is an estrogen and hence is an agonist of the estrogen receptor, the biological target of estrogens like estradiol. [4] [5] It is an estrogen ester and a prodrug of estradiol in the body. [4] [5] Because of this, it is considered to be a natural and bioidentical form of estrogen. [4]
A comparison of the structures of the natural estrogen hormone estradiol (left) and one of the nonyl-phenols (right), a xenoestrogen endocrine disruptor. Endocrine disruptors, sometimes also referred to as hormonally active agents, [1] endocrine disrupting chemicals, [2] or endocrine disrupting compounds [3] are chemicals that can interfere with endocrine (or hormonal) systems. [4]