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soy Anonymous
I eat a lot of soy daily. mostly because it's kind of cheap and has a lot of protein. ( i also get it for free from work). Just wondering if eating too much soy is bad for you since i have, but taking meds for, underactive thyroid.

heard a lot of mixed reviews on soy
>> Anonymous
Because of the phytoestrogen content, some studies, but not all, have suggested that there is an inverse correlation between soybean ingestion and testosterone in men. For this reason, they may protect against the development of prostate cancer. A theoretical decrease in the risk of prostate cancer should, however, be weighed against the possible side-effects of decreased testosterone, which are still unclear. The popular fear that soybeans might cause reduced libido and even feminine characteristics in men has not been indicated by any study; the popularity of the notion seems to be based on the simplistic misapprehension that estrogen and testosterone have a simple, inverse relationship in sexual hormone systems and sex-related behaviour. Their interplay is very complicated and largely still unknown.
>> Anonymous
>>248944
Science says soy is inferior to other sources of protein.

Many doctors have proven soy affects testosterone negatively. Studies have shown it shrinking the prostate (bad for teens), minimizing muscle mass, and increased rates of infertility.

Not a conspiracy if science backs it up.
>> Anonymous
>>248954
OH so that's why asians (whose diets are high in soy) have so much less children

makes complete sense.

face it: soy scientists are an inside job
>> Anonymous
>>248939
Actually thats the complete opposite of whats happening - corporations want you to eat soy. Its cheaper. They can cut their meat with soy in cafeterias and get double the 'meat' at only a small price increase.

Soy is everywhere because its something they want you to buy.
>> Anonymous
>>248965
They eat less soy than you think. This addresses soy in Asia, in America, and what it does to your thyroid, relevant to OP.

Soy in the Asian diet
According to a spokesman for Cancer Research UK “There’s a lot of research that countries with a high intake of soy in their diet, such as Japan, tend to have lower rates of prostate cancer and some other types, with the active ingredients in soy thought to be isoflavones.” (1).
Sounds very compelling, however let’s elaborate how much soy is actually in the Japanese and Asian diet. According to the soy industry’s own figures Asians eat very little soy; around 9.3 to 36grams per day in China, Japan, Korea, Indonesia, and Taiwan. In comparison a cup of Tofu is 252grams, or soy milk 240 grams (6).
More importantly the quality is hardly comparable, with the Asian countries generally eating their soy already fermented like miso soup, not as tofu, sausages or meat replacement foods. According to Sally Fallon from Weston A Price foundation (leading independent health group) approximately 65% of Japanese calories come from fish while in China the same percentage from Pork. So it is far from the backbone of their diet (8).
>> Anonymous
>>248973
Soy in the Western diet
Apart from the obvious where else is soy lurking? Research estimates that soy is present in 70% of all supermarket products and widely used in Fast Food chains. Soy is used to bulk out and bind many processed foods such as sausages, lasagne, beef burgers and chicken nuggets (food firms can then put a higher protein value on them). Even the husk is used for fibre in breads, cereals, and snacks. The big one is in vegetable oil- soy is the most consumed vegetable oil in the world and is used in margarines, salad dressings and cooking oils. Food labels simply list soy oil as vegetable oil
As well as that 90% of the 200 million tonnes of soy produced annually is used to feed animals (3).

Soy and the Thyroid
According to Mary Shomon editor of http://www.thyroid-info.com (9)
“Soy products increase the risk of thyroid disease. And this danger is particularly great for infants on soy formula…More than 70 years of human, animal and laboratory studies show that soybeans put the thyroid at risk.”
Dr. Mike Fitzpatrick, an environmental scientist and phytoestrogen researcher who has conducted in-depth studies on soy, particularly the use of soy formulas published in the New Zealand Medical journal. Dr. Fitzpatrick makes it clear that soy products can have a detrimental affect on both adults and infants. In particular, he firmly believes that soy formula manufacturers should remove the isoflavones -- that part of the soy products that act as anti-thyroid agents -- from their products (2)
How do researchers induce thyroid cancers in laboratory animals? They use thyroid-inhibiting foods like soy in combination with thyroid boosting drugs like Synthroid. (6)
How much soy can impair thyroid problems? Perhaps as little as 30 mg or less than a glass of soy milk. (4)