5 Common Misconceptions About Soy

5 common misconceptions about soy

Myth #1: Soy will give you moobs

Fact: For those of you who don’t know what they are, moobs are man boobs. A more medical term for this condition is gynecomastia, and it often occurs when a man takes performance-enhancing drugs or consumes excessive amounts of estrogen. While soy does contain phytoestrogen, it does not contain estrogen. This myth is likely rooted in the confusion between estrogen and phytoestrogen, but…phytoestrogen is not estrogen. If indeed this were the case, there would be a lot of men in need of bras. And while there are also rumors as to whether or not the isoflavones in soy products have a feminizing effect, in reality, clinical studies in men show that isoflavones do not affect testosterone levels or circulating estrogen levels(3).

Myth #2: Soy is not a sufficient protein source.

Fact: Soy protein has a 1.0 PDCAAS (Protein Digestibility Corrected Amino Acid Score) – the highest possible(2). This basically means that your body is able to retain and utilize the maximum amount of protein from soy as it moves through your digestive tract, making it a complete protein(1). Soy, and all other foods with a perfect PDCAAS, boost your metabolism and help you to get the most out of your diet, your exercise, and your body in general!

Myth #3: Soy causes cancer.

Fact: As we explained previously, phytoestrogen and estrogen are different. Soy contains phytoestrogen which is just a catchall term for numerous naturally occurring plant compounds which are structurally similar to mammalian estrogen, and functionally are weakly estrogenic…or antiestrogenic, meaning they actually block the effects of estrogen. Estrogen promotes proliferation of cells, and, at high levels, can increase risk of some cancers by encouraging cells to multiply more than they usually would. While soy does not contain estrogen, animal foods do. In other words, you have a higher chance of developing cancer on a meat-based diet than you do on a soy-based diet. In fact, higher rates of soy intake are associated with lower rates of breast cancer(3).

Myth #4: Soy negatively affects thyroid functionality.

Fact: Within the thyroid gland, there is an enzyme that catalyzes the necessary reactions to formulate thyroid hormone which prevents people from developing goiter, iodine deficiency, and a variety of other afflictions. In both human and animal studies, researchers found that isoflavones within soy slightly decreased the activity of this enzyme, giving validation to the common misconception that soy is bad for your thyroid glands. However, despite the effect of isoflavones, studies also found that there was no overall negative effect on thyroid function….Humans (as well as rats) only demonstrated hypothyroidism if their soy diets were iodine-depleted(3).

Myth #5: Soy is icky.

Fact: What is the first image that comes to mind when you think of soy? Tofu? Soy milk? Those weird, soy burgers that were (for whatever reason) all-the-rage a few years ago? What probably doesn’t come to mind is the delicious taste of our Total Soy Weight-Loss Shake. Our customers claim that It tastes better than any other meal replacement, that it’s thick and delicious, and that the taste is simply superb. Whether you prefer chocolate, vanilla, or strawberry, Total Soy satisfies every craving. You can even use it to make delicious concoctions of your own invention! Check out our recipe section for ideas on how to make Total Soy totally You.



  1. Klein, S. (2014). 5 myths about soy you probably still believe. HuffPost Healthy Retrieved from http://www.huffingtonpost.com/2014/07/15/soy- myths_n_5571272.html
  2. Robson, D. (2016). Soy vs. whey: The latest research! Bodybuilding.com. Retrieved from http://www.bodybuilding.com/fun/drobson71.htm
  3. Wilson, H. (2014). A vegan doctor addresses soy myths and misinformation. Free From Harm. Retrieved from http://freefromharm.org/health-nutrition/vegan-doctor-addresses-soy-myths-and-misinformation/


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