Dr. Simeons addressed vegetarians on HCG Diet in his manuscript. There are some slight modifications you can use from the section ‘vegetarians’ in his manuscript (free download of the manuscript on homepage of diyhcg.com). Through working with quite a few vegetarians ourselves, we have some additional HCG Diet tips and options.
We have also found that people are vegetarians to different degrees. The closer you can follow Dr. Simeons protocol, the better. For example, we recommend the food listed in the basic protocol first. If none of those proteins are acceptable, 1 egg and 3 egg whites or 100 grams of low-fat cottage cheese are good choices for substitutes. If the eggs and cottage cheese choices are not enough variety to make it through the protocol, then we have some other protein substitute options (certain types of Morning Star products, some specific brands of protein shakes, etc) that have been used with some degree of success by other vegetarians.