This is the most annoying and repeatedly asked question by vegans. Non-vegetarians believe that the only source of protein in the diet is meat. Apart from meat, there are other alternative sources of proteins. These products taste just like meat, but are meatless and vegan in reality. These are soy products such as tofu, seitan, tempeh, edamame, and others. Soybeans and their products are considered to be a whole source of protein. Also, there are healthy plant-based sources of protein as well for vegans. These include lentils, beans, seeds, oats, sprouted grains, chia seeds, nuts, legumes, green peas, and others.