Is Soy Protein Good for Building Muscle?


In the world of bodybuilding, protein is a big deal. You need protein to help your muscles to rebuild and repair themselves after a workout. While foods like beef, tuna, eggs and chicken, along with dairy-based protein powders, are often seen as the go-to muscle-building foods and supplements, those on a plant-based diet may need to look to other ways to get protein, such as with soy protein in food and supplement form.

The Soy and Estrogen Myth

One of the reasons why many wannabe muscle-builders avoid soy protein is because of a belief that soy will increase estrogen and reduce testosterone levels, slowing down muscle growth. A meta analysis published in a 2010 edition of the journal of "Fertility and Sterility," however, concluded that neither soy-based foods nor supplements have a negative impact on testosterone levels.

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