One of the main components of a vegetarian high-protein diet is non-meat protein sources. High-protein foods include lean meat, preferably beef, eggs, beans, milk, and fish. In this diet, it is recommended to replace meat products with eggs. Eggs are a protein source comparable to meat, poultry or fish. Of course, dairy products can also be used as a source of protein and calcium for vegetarians. But vegans who don't eat eggs or dairy have to look for other sources of protein. When eating, you can look at the nutritional label on the same food packaging. There are two most commonly used categories: wheat and beans. Oats, soybeans and their products are recommended.