"Estrogenic activity" refers to the ability of a substance to mimic or interact with the hormone estrogen in the body. It means that the substance can affect the body's hormonal balance, potentially leading to specific biological effects similar to those produced by estrogen.
Full definition
Heindel, J.J., and Vom Saal, F.S. Meeting report: batch - to batch variability in
estrogenic activity in commercial animal diets — importance and approaches for laboratory animal research.
Kruse SO, Löhning A, Pauli GF, Winterhoff H, Nahrstedt A. «Fukiic and piscidic acid esters from the rhizome of Cimicifuga racemosa and the in vitro
estrogenic activity of fukinolic acid.»
Chemicals
with estrogenic activity «have been reported to have potential adverse health effects in mammals, including humans, especially in fetal and infant states,» says Dr. George Bittner, a professor of neurobiology at the University of Texas at Austin who has served on many National Institutes of Health panels.
Sometimes they
increase estrogenic activity — depending on the type of estrogen receptor present in this kind of tissue, say, in this case, the skin — and sometimes they increase it, like in the ovaries.
It seems that across a whole host of soy products, soy lecithin was the most estrogenic (
though estrogenic activity was found in almost all foods tested, even non-soy ones).
Though Keurig recently confirmed that its pods are BPA free, they did test positive
for estrogenic activity and may also contain polystyrene, a possible carcinogen.
Alfalfa also has components that
promote estrogenic activity in women whose own sex hormone production has declined; thus, it is thought to have helped many women with the discomforts of menopause and pre-menstrual syndrome.
Avoid toxins — Many conventional body care and household cleaning products contain toxins that disrupt hormone production and / or
favor estrogenic activity in the body.
A scientific research study on eight healthy male volunteers showed that subjects supplementing with 10 mg of boron significantly increased free (active) testosterone levels and
decreased estrogenic activity as measured by a significant decrease in estradiol after only seven days.
In the body, phytoestrogens act a little like natural estrogens, and although their effect is much much weaker, they can help
normalize estrogenic activity.
Melvyn Werbach, M.D., and Michael Murray, N.D., in their book Botanical Influences on Illness (Third Line Press, 1994), say components of licorice exhibit numerous pharmacological actions,
including estrogenic activity [24] and aldosteronelike action.
Suppose the FDA told you that the 2010 NTP Brief on soy formula reports that there is «Clear evidence of adverse effects of genistein in studies with gestational, lactational and post-weaning treatment,» and that «Daidzein has
estrogenic activity of its own.»
Actually, many of the BPA replacemnets are worse than BPA in terms of
their estrogenic activity.
«BPA is just one set of chemicals that have
estrogenic activity,» he says.
made with medical and food grade silicone and nylon, free of BPA, BPS, latex, phthalates, lead and all known EA (
Estrogenic Activity) agents.
Free of all harmful chemicals including BPA, BPS, phthalates, lead and all known EA (
Estrogenic Activity) agents.
In fact, in some cases plastics labeled BPA - free released more chemicals having
estrogenic activity than products containing BPA.
One study in the journal Environmental Health Perspectives found that plastic products advertised as BPA - free still leached chemicals with
estrogenic activity — and some of these chemicals were even more potent than BPA.
Many countries require testing on plastics looking for the banned chemicals BPA and phthalates but are not testing for chemicals that have
estrogenic activity.
Chemicals having
estrogenic activity (EA) reportedly cause many adverse health effects, especially at low doses in babies and children.
«Our tests have been used extensively to... measure
the estrogenic activity of a wide range of consumer products, including cosmetics and skin care products, drugs and health supplementary products, milk powders, meats, seafood and so on,» she says.
In the research on BPA - free plastics led by Bittner, he asserts that plastics can be made with existing inexpensive materials that don't have
estrogenic activity.
Like the estrogen made in your body, phytoestrogens can bind to estrogen receptors, although
their estrogenic activity is much weaker.
And, because these phytoestrogens do not resemble true estrogen,
estrogenic activity would not actually increase.
Due to
its estrogenic activity, pregnant women and breast cancer patients should avoid alfalfa altogether.
Dong Quai influences
the estrogenic activities and stabilizes blood vessels.
It has been shown to increase the amount of free (active) testosterone for your body to utilize, all while decreasing estradiol (
estrogenic activity).
While this type of
estrogenic activity has been associated with certain reproductive cancers, intervening with a therapeutically prescribed dosage of milk thistle extract metabolizes excessive amounts, filtering potentially cancer - causing hormonal «residue» from the body.
On the other hand, when too much estrogen is around, rye's lignans, by occupying estrogen receptors, block out the much more powerful human estrogens, causing a lowering in
estrogenic activity, and providing potential protection against breast cancer.
Therefore, administration of drugs that have a combined progestagenic -
estrogenic activity increases the risk of malignant tumors.
Of the 19 women who did it, 13 showed a reduction in
estrogenic activity (68 percent).
A UK study found that if only 1 % of estrogens excreted by livestock reached surface waters untreated, that would account to 15 % of
the estrogenic activity ov those waters.