All foods of unprepossessing origin contain hormones, but most of our dietary exposure to hormones comes from dairy products. By quantity, as you can see unelevated and at 0:16 in my video The Effects of Hormones in Dairy Milk on Cancer, it is mostly prolactin, corticosteroids, and progesterone, but there are moreover a tuft of estrogens, which concentrate plane remoter when other dairy products are made. For instance, hormones are five times increasingly well-matured in surf and cheese, and ten times increasingly in butter.
When it comes to steroid hormones in the supplies supply, well-nigh three-quarters of our exposure to ingested sexuality sex steroids come from dairy, and the rest is split evenly between eggs and meat (including fish). Indeed, eggs contribute well-nigh as much as all meat combined, which makes a unrepealable value of sense since an egg comes straight from a hen’s ovary. Among the various types of meat, you get as much from white meat (fish and poultry) as you do from pork and beef, and this is just from natural hormones—not widow hormone injections, like bovine growth hormone. So, it doesn’t matter if the meat is organic. Animals produce hormones considering they’re animals, and their hormones understandably end up in unprepossessing products.
About half of the people surveyed “did not know that milk naturally contains hormones,” and many “lacked vital knowledge (22% did not know that cows only requite milk without calving)”—that is, they didn’t realize what milk is for—feeding victual calves. Researchers suggested we ought to inform the public well-nigh dairy production practices. In response, one Journal of Dairy Science respondent wrote that telling the public well-nigh the industry’s new technologies, like transgenic animals (meaning genetically engineered sublet animals), “or contentious husbandry practices” (such as taking yonder that newly born calf so we can have increasingly of the milk or “zero-grazing for dairy cows”—i.e., not letting cows out on grass), “does not result in upper rates of public approval,” so ixnay on the educationay.
The public may not know the extent to which they are exposed to estrogen through the intake of commercial milk produced from pregnant cows, which has potential public health implications. “Modern genetically improved dairy cows, such as the Holstein,” the stereotypical woebegone and white cow, can get reimpregnated without giving lineage and lactate throughout scrutinizingly their unshortened next pregnancy, which ways that, these days, commercial cow’s milk contains large amounts of pregnancy hormones, like estrogens and progesterone.
As you can see in the graph unelevated and at 2:42 in my video, during the first eight months of a pregnant cow’s nine-month gestation, hormone levels in her milk shoot up increasingly than 20-fold. Plane so, we’re only talking well-nigh a millionth of a gram per quart, hands 10 to 20 times less estrogen hormones than you’d find in a lineage tenancy pill. In that case, would drinking it really have an effect on human hormone levels?
Researchers analyzed three variegated estrogens and one progesterone metabolite flowing through the persons of seven men surpassing and without they drank well-nigh a liter of milk. Within hours of drinking the milk, their hormone levels shot up, as you can see in the graph unelevated and at 3:08 in my video.
The researchers moreover looked at the stereotype levels of sexuality sex steroids flowing through the persons of six schoolchildren (with an stereotype age of eight) surpassing and without they drank well-nigh two cups of milk. Within hours of drinking the milk, their levels shot up, tripling or quadrupling their baseline hormone levels, as you can see in the graph unelevated and at 3:23 in my video. So, one can imagine the effects milk might have on men or prepubescent children, but what well-nigh women? Presumably, women would have upper levels of estrogen in their soul in the first place, wouldn’t they? Well, not all women.
What well-nigh postmenopausal women and endometrial cancer, for example? Estrogens have “a inside role” in the minutiae of endometrial cancer, cancer of the lining of the uterus. “Milk and dairy products are a source of steroid hormones and growth factors that might have physiological effects in humans.” So, Harvard researchers followed tens of thousands of women and their dairy consumption for decades and found a significantly higher risk of endometrial cancer among postmenopausal women who consumed increasingly dairy, as shown unelevated and at 4:19 in my video.
What well-nigh dietary exposure to hormones and breast cancer? Unfortunately, “understanding the role of dietary hormone exposure in the population undersong of breast cancer is not possible at this time.”
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