Soy Protein Isolate is a great choice for vegetarians, vegans, and anyone wanting to reduce the amount of dairy products in their diet. It delivers an impressive 27g of protein per serving, with a 90% protein content — ideal when on a plant-based diet. Soy protein is a protein isolated from the soybean that has become a popular alternative to whey and casein protein powder. It’s believed to offer various health benefits, like improved circulation, lower blood sugar levels, and digestive and bone health support. But, with so many different powders to choose from, it can be hard to know which one is right for you.