This post may contain affiliate links. As an Amazon Associate I earn from qualifying purchases.
The mainstream media has got news for you these days: Overweight? Try soy! Hot-flashes? Eat soy! Blotchy skin? Rub on some soy! Lactose intolerant? Soy!
With all the ads on TV and all the products popping up everywhere, you’d think soy foods were the answer to everything that ails you. But despite the well-crafted, expensive PR campaign, soy is not a health food, and people need to know the havoc it can bring to both our bodies and the environment.
A Brief History of Soy
It is only very recently in our history that humans have been eating processed soy foods and soybean oil. Grown on a large, commercial scale by U.S. agribusiness during the 50s and 60s, by the 70s and 80s, the soybean industry was troubled by emerging evidence that soybean oil consumption lowered immunity, increased susceptibility to infectious disease, and promoted cancer.
At this same time, the bigwigs in the soybean industry got the bright idea that if they could demonize the competition by making saturated fats like lard and coconut oil appear to be the cause of heart disease—the nation’s number one killer—people wouldn’t pay much attention to the negative findings coming out about soybean oil.
Starting in the mid-1980s, the soybean oil industry began a multi-million dollar anti-saturated fat campaign. Saturated fats increased cholesterol, they said, and high cholesterol causes heart disease. The tropical oils (coconut, palm, and palm kernel oils) were singled out as being the worst offenders because of their high saturated fat content.
Some, but not all, saturated fats can raise total cholesterol, (coconut and palm oils do NOT) but there is no solid evidence that high cholesterol actually causes heart disease. That is why high cholesterol is only considered a “risk factor” rather than a cause. In fact, it looks like high cholesterol can be a protective response in the body against dangerous inflammation—which does cause heart disease.
But that didn’t stop the soy industry. The soybean industry fed misleading information to gullible consumer advocate groups like The Center for Science in the Public Interest (CSPI), which were persuaded to begin their own campaigns against saturated fats.
These high-profile organizations placed anti-saturated fat ads in the media, published newsletters, magazine articles, and books, and lobbied for political action against the use of tropical oils and other saturated fats.
Since the bulk of the attack came from supposedly impartial third parties, their message had more impact. People were swayed against saturated fats and the tropical oils they had been using safely for hundreds, or even thousands, of years.
Restaurants and food manufacturers, sensitive to customer fear, began removing these fats from their foods and replacing them with vegetable oils. Tropical oil and saturated fat consumption plummeted while soybean oil sales skyrocketed. In the United States, soybean oil soon accounted for about 80 percent of all the vegetable oil consumed.
During this time, one thing the soybean industry conveniently neglected to tell the public was that the saturated fats were not being replaced with ordinary vegetable oil, but rather by hydrogenated soybean oil!
Hydrogenated soybean oil contains toxic trans fatty acids and is far more damaging to the heart than any other fat. Trans fats have also been linked to numerous other health problems including diabetes, cancer, and various autoimmune diseases. In terms of health, trans fat is absolutely the worst fat that you could consume.
The soy industry was aware of many of the detrimental effects associated with hydrogenated vegetable oils and trans fats, but they succeeded in demonizing all saturated fats, including healthy coconut and palm oils, for the sake of profit. The plan was an overwhelming financial success.
Over the next two decades hydrogenated vegetable oils found their way into over 40 percent of all the foods on supermarket shelves, amounting to about 40,000 different products. Hydrogenated soybean oil consumption dramatically increased, and so did numerous diseases now known to be associated with trans fats.
With the growing awareness of the dangers of trans fats in hydrogenated vegetable oils and the landmark announcement in 2002 from the U.S. Institute of Medicine stating that “no level of trans fats is safe in the diet,” tropical oils are returning.
Careful review of previous research and more current medical studies have exonerated the tropical oils from the claim that they promote heart disease. In fact, they appear to help protect against heart disease as well as many of the other diseases now known to be linked to hydrogenated vegetable oils.
They are what we now call “good fats.”
Many restaurants and food manufacturers are now replacing their hydrogenated soybean oil with palm oil. Consequently, soybean oil sales are declining. In an effort to protect their profits, the soy industry has resorted to two strategies: 1) diversifying their market with new soy products like margarine, soymilk, “nutrition” bars, protein powders, pseudo-meats, livestock feed, biofuel, and more, and 2) returning to demonizing the competition in order to make their products more acceptable.
Desperate to find an alternative means of attack, the soybean industry has found a new ally in highly vocal, politically active environmental groups. Fueled by financial support and misleading data from the soy industry, some environmental groups have now waged a war against palm oil on the grounds that palm cultivation is destroying the environment.
They claim that rainforests are being leveled to make room for palm plantations, destroying the ecology and bringing endangered species, such as the orangutan, to the brink of extinction.
Anyone with any sense of responsibility for the environment would be swayed by this argument, and with good reason. The problem, however, is that while palm oil plantations are indeed responsible for deforestation, the soybean industry is causing more destruction to the environment than probably any other crop on the planet.
Soy and the Environment
In the time it takes to read this entire article, an area of Brazil’s Amazon rainforest larger than 200 football fields will have been destroyed, much of it for soybean cultivation, much of which is fed to livestock.
Today, industrial-scale soybean producers are joining loggers and cattle ranchers in speeding up destruction and further fragmentation of the great Brazilian wilderness. Between the years 2000 and 2005, Brazil lost more than 50,000 square miles of rainforest—a large portion of that for soybean farming.
Soybean production in the Brazilian Amazon soared after heat-tolerant varieties were introduced in 1997. In just ten years, exports of soybeans grown in the Amazon Basin reached 42 million tons a year. Total annual soybean production in Brazil today is about 85 million tons, and Brazil will soon surpass the United States as the world’s leader in soybean production.
Brazil holds about 30 percent of the Earth’s remaining tropical rainforest. The Amazon Basin produces roughly 20 percent of the Earth’s oxygen, creates much of its own rainfall, and harbors hundreds of thousands of species, many yet to be discovered. The Brazilian rainforest is the world’s most biologically diverse habitat.
Close to 20 percent of the Amazon rainforest has already been cut down. At the current rate of clearing, scientists predict that 40 percent of the Amazon will be destroyed and a further 20 percent degraded within two decades. If that happens, the forest’s ecology will begin to unravel.
Intact, the Amazon produces half its own rainfall through the moisture it releases into the atmosphere. Eliminate enough of that rain through clearing, and the remaining trees dry out and die, the fragile rainforest soils blow away, and the forest becomes a desert. Currently trees are being wantonly burned to create open land for soybean cultivation. Consequently, Brazil has become one of the world’s largest emitters of greenhouse gases.
The decimation of the Amazon is, for the most part, done legally. Even the governor of the state of Mato Gross, on the edge of the Amazon Basin, is a part of it. Governor Blairo Maggi is the world’s largest single soybean producer, growing 350,000 acres. That’s about 547 square miles of Amazon rainforest that have been leveled for soybean production!
He is just one of many industrial-sized soybean operations in the area. In 2005, Greenpeace awarded Maggi the Golden Chain Saw award for his role in leveling the rainforest.
But, clearing and tilling the land for soybean production is only part of the problem. Soybean cultivation destroys habitat for wildlife including endangered or unknown species, and increases greenhouse gases which contribute to global warming.
Industrial soybean crops need large amounts of acid-neutralizing lime, as well as synthetic fertilizers, pesticides, and herbicides, all of which are creating an environmental hazard.
Toxic chemicals from soy production contaminate the forest, poison rivers, destroy wildlife and cause birth defects in humans. And, in undeveloped countries, soy production disrupts the life of indigenous tribes who depend on the forest for food and shelter, replaces traditional crops, and transfers the value added from processing from the local population to multinational corporations.
The environmental destruction caused by soybean farming isn’t limited to the Amazon; it occurs throughout the world wherever soybeans are produced.
In the U.S. alone, over 80 million acres of land are covered in soybeans. That’s hundreds of thousands of acres of deforestation, habitat destruction, over-cultivation and destruction of soils, and billions of tons of toxic chemicals spewed into the environment year after year, contaminating our soils, water, and destroying wildlife and human health.
And genetically modified soy was specifically developed to withstand the toxins so farmers could spray even more pesticides on them without diminishing yields.
Over 80% of all soybeans grown in the U.S. (and two-thirds worldwide) are genetically-modified to withstand the herbicide glyphosate, which is usually sold under the trade name Roundup. Because so much Roundup is used on these crops, the residue levels in the harvested crops greatly exceed what until very recently was the allowable legal limit. For the technology to be commercially viable, the FDA had to triple the limit on residues of glyphosate that can remain on the crop.
Many scientists have protested that permitting increased residues shows that corporate interests are given higher priority than public safety at the FDA, but the increased levels have remained in force. Glyphosate, which is highly toxic, and classified as a probable carcinogen, can now be easily detected in our water supply and in the bloodstreams of most Americans.
Industrially grown soybeans are arguably the most environmentally offensive agricultural crop in the world.
Replacing soybean oil with coconut or olive oil is not only a healthier option, but each is a relatively low-impact crop that would save countless acres of land from untold environmental damage.
Soybeans and Health
Many people believe that soy is good for you—a superfood even. After all, Asians eat soy, and they are some of the healthiest people in the world, right? Claims that soybeans have been a major part of the Asian diet for more than 3,000 years are simply not true.
In fact, the people of China, Japan, and other countries in Asia eat relatively little soy, and they typically only eat it after it has been fermented for long periods of time, which destroys the toxins inherent in it. The soy industry’s own figures show that soy consumption in China, Indonesia, Korea, Japan, and Taiwan ranges from 9.3 to 36 grams per day. That’s equivalent to a few, small blocks of tofu floating in a bowl of miso soup.
Soy has never been considered a substitute for animal protein in Asia.
In contrast, many Americans today think nothing of consuming a cup of tofu, a couple glasses of soy milk, handfuls of soy nuts, soy “energy bars,” and soy “veggie” burgers, all in one day!
Infants on soy formula receive the most of all, both in quantity and in proportion to body weight. Soy is also the key ingredient in faux-meat and dairy products with names like Silk, Soysage, Not Dogs, Fakin Bakin and Tofurkey.
Then you have to consider the “hidden” soy in the form of vegetable oil, protein isolate, and soy lecithin found in over 70% of all packaged foods and just about everything you’d find in a fast food restaurant.
It’s used as filler in hamburgers, as vegetable oil and as an emulsifier.
It’s in chocolate bars, salad dressing, macaroni and cheese, and chicken nuggets.
It’s even ingested second-hand in the industrially-produced, feedlot meat, dairy and eggs from animals that were fed GMO soy most of their lives.
It’s hard to find a product that doesn’t contain soy these days!
“Even if you read every label and avoid cardboard boxes, you are likely to find soy in your supplements and vitamins (look out for vitamin E derived from soy oil), in foods such as canned tuna, soups, sauces, breads, meats (injected under poultry skin), and chocolate, and in pet food and body-care products… It hides in tofu dogs under aliases such as textured vegetable protein, hydrolyzed vegetable protein, and lecithin—which is troubling, since the processing required to hydrolyze soy protein into vegetable protein produces excitotoxins such as glutamate (think MSG) and aspartate (a component of aspartame), which cause brain-cell death.”
Mary Vance, Terrain Magazine
In short, there is no historical precedent for eating the large amounts of soy now being consumed, and we are all participating in an experiment whose outcome is still unclear.
Since we Americans eat so much of it, it’s important to understand how soy can affect us. What we do know about soy is a bit alarming:
- Soy contains very high levels of phytic acid, which reduces your body’s assimilation of calcium, magnesium, copper, iron and zinc. High phytate diets have caused growth problems in children.
- Two senior U.S. government scientists, Drs. Daniel Doerge and Daniel Sheehan, have revealed that chemicals in soy could increase the risk of brain damage in both men and women, and abnormalities in infants.
- Protease inhibitors in soy interfere with protein digestion and have caused malnutrition, poor growth, digestive distress, and pancreatitis.
- Lectins and saponins in soy can cause leaky gut and other gastrointestinal and immune problems.
- Scientists have known since the mid-1940s that soy phytoestrogens are powerful enough to affect fertility and even promote estrogen-positive breast cancer. Although scientists discovered only recently that soy lowers testosterone levels, soy phytoestrogens are known to disrupt endocrine function and are so potent, they are marketed to older women for relief of hot-flashes and other menopausal symptoms. If the hormones in soy are strong enough to relieve hot flashes, why would we feed it to children?
- Soy phytoestrogens are potent antithyroid agents that can cause hypothyroidism and may cause thyroid cancer. In infants, consumption of soy formula has been linked to autoimmune thyroid disease.
- Vitamin B-12 analogs in soy are not absorbed and actually increase the body’s requirement for B-12.
- Soy foods increase the body’s requirement for vitamin D.
- Processing of soy protein results in the formation of toxic lysinoalanine and highly carcinogenic nitrosamines.
- Free glutamic acid or MSG, a potent neurotoxin, is formed during soy food processing and additional amounts are added to many soy foods.
- Processed soy foods contain high levels of aluminum which is toxic to the nervous system and the kidneys and strongly implicated in Alzheimer’s disease.
- Archer Daniels Midland recently withdrew its application to the FDA for GRAS (Generally Recognized as Safe) status for soy isoflavones following an outpouring of protest from the scientific community. The FDA never approved GRAS status for soy protein isolate because of concern regarding the presence of toxins and carcinogens in processed soy.
- Soy is one of the greatest vectors for the consumption of glyphosate or Roundup, a carcinogenic herbicide.
Don’t be fooled: Soy is bad for you, and for the planet.
Soy Processing
There’s nothing natural about today’s modern soy protein products; they are very much factory-made pseudo-foods. Textured soy protein, for example, is made by forcing defatted soy flour through a machine called an extruder under conditions of such extreme heat and pressure that the very structure of the soy protein is changed.
Production differs little from the extrusion technology used to produce starch-based packing “peanuts,” fiber-based industrial products, and plastic toys.
Before soybeans get to your table, they undergo a rigorous process to strip them of their oil. Hexane or other volatile, petroleum-based solvents are first applied to help separate the oil from the beans, leaving trace amounts of these toxins in the commercial product. After the oil is extracted, the defatted flakes are used to form soy protein products. With the exception of full-fat soy flour, almost all soybean products contain trace amounts of carcinogenic solvents.
The process of making soy protein isolate (SPI) begins with defatted soybean meal, which is mixed with a caustic alkaline solution to remove the fiber, then washed in an acid solution to precipitate out the protein. The protein curds are then dipped into another alkaline chemical solution and spray-dried at extremely high temperatures. SPI is then often spun into protein fibers using technology borrowed from the textile industry.
These refining processes improve taste and digestibility, but destroy the vitamin, mineral, and protein quality, and increase levels of carcinogens such as nitrosamines.
Soy protein isolate appears in so many products that consumers would never guess that the Federation of American Societies for Experimental Biology (FASEB) decreed in 1979 that the only safe use for SPIs was for sealers for cardboard packages.
Soy and Allergies
Many people don’t know that soy is one of the top eight allergens that cause immediate hypersensitivity reactions such as coughing, sneezing, runny nose, hives, diarrhea, difficulty swallowing, and anaphylactic shock.
Delayed allergic responses are even more common and occur anywhere from several hours to several days after the food is eaten. These have been linked to sleep disturbances, bedwetting, sinus and ear infections, crankiness, joint pain, chronic fatigue, gastrointestinal woes, and other mysterious symptoms.
Although severe reactions to soy are rare compared to reactions to peanuts, tree nuts, fish, and shellfish, soy has been underestimated as a cause of food anaphylaxis.
Soy allergies are on the rise for three reasons: the growing use of soy infant formula, the increase in soy-containing foods in grocery stores, and the possibility of the greater allergenicity of genetically modified soybeans.
According to Monsanto’s own tests, compared to normal soybeans, Roundup Ready genetically-engineered soybeans contain 29 percent less of the brain nutrient choline, and 27 percent more trypsin inhibitor—the potential allergen that interferes with protein digestion.
Soy products are often prescribed and consumed for their phytoestrogen content, but according to the company’s tests, the genetically altered soybeans have lower levels of phenylalanine, an essential amino acid that affects levels of phytoestrogens.
And levels of lectins, which are most likely the culprit in soy allergies, are nearly double in the genetically-engineered variety.
Soy and Hormones
Humans and animals appear to be the most vulnerable to the effects of soy estrogens prenatally, during infancy and puberty, during pregnancy and lactation, and during the hormonal shifts of menopause. Of all these groups, infants on soy formula are at the highest risk because of their small size and developmental phase, and because formula is their main source of nutrition.
In the years since soy formula has been in the marketplace, parents and pediatricians have reported growing numbers of boys whose physical maturation is either delayed or does not occur at all.
Breasts, underdeveloped gonads, undescended testicles (cryptorchidism), and steroid insufficiencies are increasingly common. Sperm counts are also falling. Because of the estrogens in soy, men and boys, in particular, should eat little to no soy.
Soy formula is bad news for girls as well. With increased estrogens in the environment and the diet, an alarming number of girls are entering puberty much earlier than normal. One percent of girls now show signs of puberty, such as breast development or pubic hair, before the age of three.
By the age of eight, 14.7 percent of Caucasian girls and 48.3 percent of African American girls had one or both of these characteristics. The fact that blacks experience earlier puberty than whites is not a racial difference but a recent phenomenon.
Most experts blame this epidemic of “precocious puberty” on environmental estrogens from plastics, pesticides, commercial meats, etc., but some pediatric endocrinologists believe that soy is a significant contributor. Of all the estrogens found in the environment, soy is the likeliest explanation of why African American girls are reaching puberty so early.
Since its establishment in 1974, the federal government’s Women, Infants and Children (WIC) program has provided free infant formula to teenage and other low-income mothers while failing to encourage breastfeeding. Because of perceived or real lactose intolerance, black babies are much more likely to receive soy formula than white babies.
Most of the fears concerning soy formula have focused on estrogens. There are other problems as well, notably much higher levels of aluminum, fluoride, and manganese than are found in either breastmilk or dairy formulas. These metals are byproducts of soy processing and all three have the potential to adversely affect brain development.
Although trace amounts of manganese are vital to the development of the brain, toxic levels accrued from ingestion of soy formula during infancy have been found in children suffering from attention-deficit disorders, dyslexia, and other learning problems.
Yet the belief persists that soy hormones are “safe” because they are “weak” and “natural.”
Although the soy industry has claimed that soy estrogens are anywhere from 10,000 to 1,000,000 times weaker than the human estrogen estradiol, the correct figure is only 1,200 times as weak. Though this still sounds quite weak, it is not—because of the quantity of these estrogens ingested by infants on soy formula, and by children and adults who eat soy in multiple hidden forms every day, including in feedlot meat and industrially-produced eggs.
Americans consume far more soy phytoestrogens (called isoflavones) than were ever part of a traditional diet in Asia. The average isoflavone intake in China for adults is 3 milligrams, or 0.05 mg per kilogram of body weight. In Japan, the figures range from 10 to 28 mg, or 0.17 to 0.47 mg isoflavones per kg of body weight. In contrast, infants receiving soy formula average 38 mg of isoflavones, which comes to a shocking 6.25 mg/kg of body weight!
The Right Soy
It is not true that if a little soy is good, a lot must be better. For soy, the dose makes the poison. Asians learned hundreds of years ago that the only way to safely eat soy is to ferment it, which removes the phytates and reduces the trypsin inhibitors. (Unlike other beans, soaking, and even cooking, will not do this.)
So, if you choose to eat soy foods, you will find the most benefit from eating small quantities of organically-grown, whole-food, fermented soy, like real soy sauce, miso, tempeh, or natto, the way Asian people have safely enjoyed soy for millennia.
The bottom line is when it comes to soy, we are all participating in what Daniel M. Sheehan, former senior toxicologist with the FDA’s National Center for Toxicological Research, has called a “large, uncontrolled and basically unmonitored human experiment.”
And if that weren’t scary enough, soy cultivation—particularly genetically engineered soy—is one of the most devastating things we can do to the environment.
One of the best ways to avoid the carcinogenic chemical residues and xeno-estrogens in soy (and avoid participating in the environmental damage soy causes, too) is to eat whole, unprocessed food as often as possible, and choose pasture-raised, grass-fed meat, dairy and eggs from farms that don’t feed their livestock GMO soy.
Resources
- The Whole Soy Story: The Dark Side of America’s Favorite Health Food
- Soy: The Dark Side of America’s Favorite “Health” Food
- A Word About Soy
- Are GMOs causing an increase in allergies?
- The Hazards of Feeding Soy to Children
- Warnings on danger of soy formula milk; Edinburgh study highlights
- Component in Soy Products Causes Reproductive Problems in Laboratory Mice
- Deforestation in the Amazon
- Soybean Cultivation as a Threat to the Environment in Brazil
- The Soy Juggernaut – Deforestation and Land Grabs in Brazil
87 thoughts on “Why Soy is Bad for You and the Planet”