Whey protein and soy protein are both used as dietary supplements to help increase protein and improve overall health, but what are the differences between them? Both soy and whey have distinct health benefits, and can be used to achieve certain health and fitness goals, but the differences between the two forms of protein mean that the two are best suited for different things. In this article, we’ll take a look at the difference between whey and soy, and when it’s the right time to add either (or both) to your diet. Soy Protein Soy protein is taken from the soybean plant, which you probably also know as being the source of tofu. Given that tofu is one of the main sources of protein for people on vegetarian and vegan diets, the soybean’s reputation as a source of healthy protein is well established. More than that, though, soy protein is loaded with isoflavones, cancer-preventing phytochemicals, calcium, fiber, iron, zinc, and B vitamins. Soy protein has been shown to help maintain healthy blood sugar, lower