well-planned vegetarian diet

Getting enough protein isn't tough with a well-planned vegetarian diet, especially if you include eggs and dairy. It's when a vegetarian diet isn't planned at all that nutrition trouble can start. All too often people give up eating meat but end up eating more carbohydrates and snacks. Look for alternative sources of protein, including beans (kidney beans, chickpeas, and lentils, etc.), nuts, soy, and low-fat dairy products.
If you're a vegan, you can still get protein from eating beans and soy products, but it may be a little harder to get enough, and you also have to pay attention to other important nutrients like B vitamins, iron, and calcium.