For vegetarians, there are alternatives for the daily ration of meat. Dr. Simeons substitutes 500cc or ½ liter of skim milk; which I would split to 250ml per meal. Other alternatives for the daily meat ration include 100 grams of non-fat cottage cheese or one protein portion from eggs. This would be one whole egg, boiled or poached, with the whites of 3 more eggs.
These substitutes work inside the diet, yet Dr. Simeons found that you will lose weight half as fast as non-vegetarians. However, you need to be comfortable with this program and you need the protein or else you will lose muscle instead of fat and we do not want that!