Dairy goods such as Greek yoghurt, cheese, yellow cheese, milk (soy milk, cow milk, almond milk), meat (fish, hog meat, chicken meat, steaks, ground beef, sea food) and eggs, nuts (hazelnuts, walnuts, almonds), seeds (sunflower seed, pumpkin seed, chia seed, and so on are all high in protein. Smoothies and protein smoothies have grown very popular across the globe, and for good reason. First and foremost, they are quite simple to make.