The Truth About Soy

Who hasn't heard of the marvels of soy? The marketing bandwagon has touted soy as the perfect health food for decades. But could something that sounds so healthful actually be dangerous?

If you take the time to look into the actual science, then the answer is yes. Thousands of studies link soy to malnutrition, digestive distress, immune system breakdown, thyroid dysfunction, cognitive decline, reproductive disorders and infertility -- even cancer and heart disease.

One of the primary reasons it would be wise for you to avoid soy is that more than 90 percent of soybeans grown in the United States are genetically modified. Since the introduction of genetically engineered foods in 1996, we've had an upsurge in low birth weight babies, infertility, and other problems in the U.S., and animal studies have shown devastating effects from genetically engineered soy including allergies, sterility, birth defects, and offspring death rates up to five times higher than normal.

Soybean crops are also heavily sprayed with chemical herbicides, such as Round Up and glyphosate, which a French team of researchers have found to be carcinogenic.

Soybeans -- even organically grown soybeans -- naturally contain "antinutrients" such as saponins, soyatoxin, phytates, trypsin inhibitors, goitrogens and phytoestrogens. Traditional fermentation destroys these antinutrients, which allows your body to enjoy soy's nutritional benefits. However, most Westerners do not consume fermented soy, but rather unfermented soy, mostly in the form of soymilk, tofu, TVP, and soy infant formula.

Unfermented soy has the following 10 adverse affects on your body:

1. High Phytic Acid (Phytates): Reduces assimilation of calcium, magnesium, copper, iron and zinc. Phytic acid in soy is not neutralized by ordinary preparation methods such as soaking, sprouting and long, slow cooking, but only with long fermentation. High-phytate diets have caused growth problems in children.

2. Trypsin inhibitors: Interferes with protein digestion and may cause pancreatic disorders. In test animals, trypsin inhibitors in soy caused stunted growth.

3. Goitrogens: Potent agents that block your synthesis of thyroid hormones and can cause hypothyroidism and thyroid cancer. In infants, consumption of soy formula has been linked with autoimmune thyroid disease. Goitrogens interfere with iodine metabolism.

4. Phytoestrogens/Isoflavones: Plant compounds resembling human estrogen can block your normal estrogen and disrupt endocrine function, cause infertility, and increase your risk for breast cancer.

5. Hemagglutinin: A clot-promoting substance that causes your red blood cells to clump, making them unable to properly absorb and distribute oxygen to your tissues.

6. Synthetic Vitamin D: Soy foods increase your body's vitamin D requirement, which is why companies add synthetic vitamin D2 to soymilk (a toxic form of vitamin D).

7. Vitamin B12: Soy contains a compound resembling vitamin B12 that cannot be used by your body, so soy foods can actually contribute to B12 deficiency, especially among vegans.

8. Protein Denaturing: Fragile proteins are denatured during high temperature processing to make soy protein isolate and textured vegetable protein (TVP). Chemical processing of soy protein results in the formation of toxic lysinoalanine and highly carcinogenic nitrosamines.

9. MSG: Free glutamic acid, or MSG, is a potent neurotoxin. MSG is formed during soy food processing, plus additional MSG is often added to mask soy's unpleasant taste.

10. Aluminum and Manganese: Soy foods contain high levels of aluminum, which is toxic to your nervous system and kidneys, and manganese, which wreaks havoc on your baby's immature metabolic system.

Soy's antinutrients are quite potent. Drinking just two glasses of soymilk daily provides enough of these compounds to alter a woman's menstrual cycle. But if you feed soy to your infant or child, these effects are magnified a thousand-fold. Infants fed soy formula may have up to 20,000 times more estrogen circulating through their bodies as those fed other formulas. You should NEVER feed your infant a soy-based formula!

In fact, infants fed soy formula take in an estimated five birth control pills' worth of estrogen every day.

As dangerous as unfermented soy is, fermented soy from organic soybeans is a different story altogether and can be a beneficial part of your diet. Fermented soy is a great source of vitamin K2, and K2 (combined with vitamin D) is essential in preventing osteoporosis, cardiovascular disease, dementia, and various types of cancer.

Note that tofu is NOT on this list and is among the soy foods I do not recommend. Traditionally fermented soy products include:

• Miso
• Tempeh
• Natto
• Soy sauce (as long as it's fermented in the traditional way, and not all are)

Soybeans contain phytoestrogens, which mimic the body’s natural estrogen hormones. For men, this can lead to a testosterone imbalance, infertility, low sperm count, and increased risk of cancers. For women, it can cause estrogen dominance, which has been linked to infertility, menstrual troubles and cancer…

· These phytoestrogens are so strong that a baby consuming only soy formula is consuming the equivalent hormones of 4 birth control pills a day!

· The high levels of phytic acid in soy inhibit the body’s ability to absorb important minerals, including zinc, calcium, copper, iron and magnesium (which many people are dangerously deficient in already).

·  Soy also contains protease inhibitors, which can block the enzymes that are necessary for the digestion of certain proteins.

·  The goitrogens in soy are potent anti-thyroid compounds that can lead to  endocrine disruption and thyroid disorders. Infants on soy formula have a much higher risk of autoimmune thyroid disease. (note: cruciferous vegetables like broccoli, cauliflower and cabbage have these properties as well, though they are lessened greatly by cooking. Cooking does not remove these compounds from soy based foods!)

·  Soy is often promoted as an alternative food for celiac and gluten intolerant people, but its lectins can be harmful to the intestines and prevent healing even when gluten is removed.

·  Many studies have found even more harmful properties of soy: This link has a summary of many studies done about the harmful effects of soy.

·  Consumption of soy foods increases the body’s need for Vitamin D, Vitamin B-12, calcium and magnesium.

In addition to being harmful to our bodies, soy production is harmful to the planet and to livestock who eat it as well. Almost all soybeans grown today are genetically modified and “Round-up ready.” They contain a gene that allows them to be directly sprayed with pesticides without dying. There is some evidence that this gene can mutate and create a pesticide-like toxin in the body.

This mutation means that soybeans can be (and are) sprayed with large amounts of pesticides and herbicides during their cultivation. In addition, soybeans strip the soil of many nutrients, leaving soil depleted.

Animals who are fed soy can suffer many of the same health consequences as people who consume too much soy, and these harmful properties are then passed on in their meat.

An Inferior Protein Source

Besides the lectin and phytic acid in soybeans, they aren’t the complete protein source they are touted to be. Like all beans, they lack the amino acids Methionine and Cystine. While they are often promoted for being able to provide Vitamin B-12 to those eating a vegetarian diet, the Vitamin B-12 in soybeans can not be used by the body and actually cause the body to need more B-12.

There are no nutrients in these foods that can’t be found in higher amounts in meats, vegetables and healthy fats, so stick to those and avoid the lectins and phytic acid!

A Note on Fermented Soy

If you are going to consume soy, it is least harmful in its fermented state. Foods like Tempeh and Miso have some health promoting properties and many of the harmful anti-nutrients are fermented out. These are fine in moderation. Just look for ones that have been traditionally fermented.

Soy is Everywhere!

If you stay away from tofu and soymilk, you might still be consuming much more soy than you think!

Practically all processed foods contain some form of soy. Even some canned tuna contains a soy protein as part of the broth! Check the foods you buy for these ingredients: Soy lecithin, soy protein concentrate, soy protein isolate, texturized vegetable protein, hydrolyzed vegetable protein or any other phrase containing the word “soy.” Vegetable oil, candy bars, health bars, ice cream, potato chips, fast foods, pizzas, and prepackaged foods at all grocery stores contain some form of soy.

Sources:

http://www.huffingtonpost.com/dr-mercola/soy-health_b_1822466.html

http://wellnessmama.com/3684/is-soy-healthy/ 

http://truefitnessbootcamp.com/Nutrition_Challenge.html