Arguments Supporting Soy

Arguments Against Soy

• Asian cultures have consumed soy for centuries and have excellent health.
• Soy is a good substitute for those avoiding dairy and/or animal products.
• Excellent source of dietary fiber.
• Improves the nutritional value of other foods that it’s added to.
• Contains all nine essential amino acids.
• Good vegetarian protein source.
• Soy may protect against osteoporosis.
• High in isoflavones, a plant hormone which can be used as an estrogen replacement for menopausal women.
• The American Academy of Pediatrics states that “In term infants whose nutritional needs are not being met from maternal breast milk or cow milk-based formulas, isolated soy protein-based formulas are safe and effective alternatives to provide appropriate nutrition for normal growth and development.”
• Reduces the rates of certain types of cancers (e.g. prostate cancer).
• Can prevent coronary heart disease because it lowers bad cholesterol (LDL) and raises good cholesterol (HDL).

• Asian soy consumption is much lower than Americans perceive.  It is used more as a condiment and is typically fermented (tempeh, natto, miso).
• Soy contains naturally occurring toxins which are eliminated during traditional fermentation methods.  Non-fermented products retain some of these toxins.
• Soy is often genetically modified (except for organic which ensures the soy is non- GMO).
• Soy is one of the eight most common food allergens which can lead to a variety of symptoms.
• Some speculate that soy consumption could be linked to a greater incidence of Alzheimer’s disease.
• Trypsin inhibitors are found in soy and may interfere with protein digestion.
• Phytic acid may impair the body’s ability to absorb minerals.
• Isoflavones found in soy may suppress thyroid function.
• Phytoestrogens found in soy-based formulas may be unhealthy for babies.
• The American Heart Association has pulled back its strong endorsement of soy as being beneficial in reducing heart disease.
• Textured soy protein often contains MSG.