If you were to carefully review the thousands of studies published on soy, I strongly believe you would reach the same conclusion as I have—which is, the risks of consuming unfermented soy products FAR outweigh any possible benefits.Notice I said unfermented soy products.For centuries, Asian people have been consuming fermented soy products such as natto, tempeh, and soy sauce, and enjoying the health benefits. Fermented soy does not wreak havoc on your body like unfermented soy products do.Unfortunately, many Americans who are committed to healthy lifestyles have been hoodwinked and manipulated into believing that unfermented and processed soy products like soymilk, soy cheese, soy burgers and soy ice cream are good for them.
The vast majority of soy at your local market is not a health food. The exception is fermented soy, which I’ll explain more about later and even worse GMO soy that is contaminated with large pesticide residues as the reason it is GMO is so they can spray the potent toxic herbicide Roundup on them to improve crop production by killing the weeds.Unlike the Asian culture, where people eat small amounts of whole non-GMO soybean products, western food processors separate the soybean into two golden commodities—protein and oil. And there is nothing natural or safe about these products.Here is just a sampling of the health effects that have been linked to soy consumption:
Here is a summary of soy’s most glaring problems.
- 91 percent of soy grown in the US is genetically modified (GM). The genetic modification is done to impart resistance to the toxic herbicide Roundup. While this is meant to increase farming efficiency and provide you with less expensive soy, the downside is that your soy is loaded with this toxic pesticide. The plants also contain genes from bacteria that produce a protein that has never been part of the human food supply.GM soy has been linked to an increase in allergies. Disturbingly, the only published human feeding study on GM foods ever conducted verified that the gene inserted into GM soy transfers into the DNA of our gut bacteria and continues to function. This means that years after you stop eating GM soy, you may still have a potentially allergenic protein continuously being produced in your intestines.Even more frightening is the potential for GM soy to cause infertility in future generations, which has been evidenced by recent Russian research.
- Soy contains natural toxins known as “anti-nutrients.”Soy foods contain anti-nutritional factors such as saponins, soyatoxin, phytates, protease inhibitors, oxalates, goitrogens and estrogens. Some of these factors interfere with the enzymes you need to digest protein. While a small amount of anti-nutrients would not likely cause a problem, the amount of soy that many Americans are now eating is extremely high.
- Soy contains hemagglutinin.Hemagglutinin is a clot-promoting substance that causes your red blood cells to clump together. These clumped cells are unable to properly absorb and distribute oxygen to your tissues.
- Soy contains goitrogensGoitrogens are substances that block the synthesis of thyroid hormones and interfere with iodine metabolism, thereby interfering with your thyroid function.
- Soy contains phytates.Phytates (phytic acid) bind to metal ions, preventing the absorption of certain minerals, including calcium, magnesium, iron, and zinc -- all of which are co-factors for optimal biochemistry in your body. This is particularly problematic for vegetarians, because eating meat reduces the mineral-blocking effects of these phytates (so it is helpful—if you do eat soy—to also eat meat).
- Soy is loaded with the isoflavones genistein and daidzeinIsoflavones are a type of phytoestrogen, which is a plant compound resembling human estrogen. These compounds mimic and sometimes block the hormone estrogen, and have been found to have adverse effects on various human tissues. Soy phytoestrogens are known to disrupt endocrine function, may cause infertility, and may promote breast cancer in women.Drinking even two glasses of soymilk daily for one month provides enough of these compounds to alter your menstrual cycle. Although the FDA regulates estrogen-containing products, no warnings exist on soy.
- Soy has toxic levels of aluminum and manganeseSoybeans are processed (by acid washing) in aluminum tanks, which can leach high levels of aluminum into the final soy product.Soy formula has up to 80 times higher manganese than is found in human breast milk.
- Soy infant formula puts your baby’s health at risk.Nearly 20 percent of U.S. infants are now fed soy formula, but the estrogens in soy can irreversibly harm your baby’s sexual development and reproductive health. Infants fed soy formula take in an estimated five birth control pills’ worth of estrogen every day.Infants fed soy formula have up to 20,000 times the amount of estrogen in circulation as those fed other formulas!
I want to be clear that I am not opposed to all soy. Soy can be incredibly healthful, but ONLY if it is organic and properly fermented.After a long fermentation process, the phytate and “anti-nutrient” levels of soybeans are reduced, and their beneficial properties become available to your digestive system.You may have heard that Japanese people live longer and have lower rates of cancer than Americans because they eat so much soy—but it’s primarily fermented soy that they consume, and it’s always been that way.Fermented soy products are the only ones I recommend consuming.These are the primary fermented soy products you’ll find:
- Tempeh a fermented soybean cake with a firm texture and nutty, mushroom-like flavor.
- Miso, a fermented soybean paste with a salty, buttery texture (commonly used in miso soup).
- Natto, fermented soybeans with a sticky texture and strong, cheese-like flavor.
- Soy sauce, which is traditionally made by fermenting soybeans, salt and enzymes; be wary because many varieties on the market today are made artificially using a chemical process.Please note that tofu is NOT on this list. Tofu is not fermented, so is not among the soy foods I recommend.
One of the main benefits of fermented soy, especially natto, is that it is the best food source of vitamin K2. Vitamin K2 is essential to preventing osteoporosis, cardiovascular disease, and diseases of the brain such as dementia, and protecting you from various cancers including prostate, lung, liver cancer and leukemia.Vitamin K acts synergistically with vitamin D to keep you healthy.Vitamin K is sometimes referred to as the “forgotten vitamin” because its benefits are often overlooked. It was named after the word “Koagulation,” to reflect its essential role in blood clotting. In fact, the enzyme nattokinase—derived from natto—is safer and more powerful than aspirin in dissolving blood clots, and has been used safely for more than 20 years.If you enjoy natto or some of the other fermented soy foods, you can get several milligrams of vitamin K2 from them each day (this level far exceeds the amount of vitamin K2 found even in dark green vegetables).Unfortunately, the health benefits of many of the fermented soy foods fall by the wayside because many Americans do not enjoy their flavor.If you don’t want to consume natto to get your vitamin K2, the next best thing would be to get use supplemental Vitamin K2 (MK-7). Remember, vitamin K must be taken with a source of fat in order to be absorbed.I suggest adults consume about 150 mcg of vitamin K2 daily.
For a simple rule of thumb, just remember that unless soy is fermented (tempeh, miso, natto, or traditionally made soy sauce), you’re better off avoiding it.Soy foods to avoid include:TofuTVP (texturized vegetable protein) or soy protein isolate, which contains a large amount of msg, which you should definitely not consume
- Soybean oil
- Soy cheese, soy ice cream, soy yogurt
- Soy “meat” (meatless products made of TVP)
- Soy protein
- Soy infant formulaThe best way to eliminate non-fermented soy from your diet is to avoid all processed foods and instead purchase whole foods that you prepare yourself.If you do buy packaged foods, you can check the label to see if it contains soy. The Food Allergen Labeling and Consumer Protection Act, which took effect in January 2006, requires that food manufacturers list soy on the label, because it’s one of the top eight food allergens.So, even if soy is hidden in colors, flavors, or spice blends added to foods, it must be clearly stated on the label.One other common source of soy is lecithin which is used as a emulsifier in many foods and supplements. Most lecithin in the US is derived from soy but there are some newer products that extract it from organic sunflower. We switched over to the organic sunflower lecithin a few years ago in all of our products.
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