Many protein bars use soy protein isolates, which was once considered a waste byproduct from soy bean oil processing until someone discovered that they could make some cha-ching off the substance by throwing it in a bar and labeling it as a “great source of protein.” Marketing, you gotta love it! However, what the manufacturers and marketers don’t tell you is that the process they use to isolate the protein from the bean leaves behind toxins such as aluminum, hexane and nitrites—a.k.a., things you don’t want floating around inside you.
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