Nuts, Seeds, Beans and Legumes. Pumpkin seeds and peanuts are good for blood type A individuals, says D'Adamo, as are beans and legumes like lentils, black-eyed peas, red soybeans, black beans and pinto beans.Type A people are warned to avoid pistachios, cashews and beans such as navy, red, garbanzo or kidney beans.airy Products and Eggs. Type A individuals following the Blood Type diet are instructed to avoid all dairy products and eggs. If you need a substitute, use rice or soy milk. Some type A people may be able to occasionally eat yogurt, goat cheese or kefir without experiencing health problems, says D'Adamo.