What is pea protein isolate pea protein isolate is a natural vegetable based protein which offers a comprehensive nutritional and amino acid profile free of gluten lactose cholesterol and other anti nutritional factors pea protein isolate is a great alternative to milk based proteins and is the perfect option for vegans looking to increase protein intake pea protein isolate benefits its a great source of protein for those with certain food intolerances pea protein isolate has over 23g