If a person has a severe protein deficiency and needs about ten times the protein of average persons, it would be difficult to get enough protein from eggs, dairy, and vegetable sources, so a bunch of meat would be a prudent treatment.

Vegetarians eat eggs and drink milk. Vegans avoid all animal products completely. There are B12 fortified foods:

http://www.veganhealth.org/b12/vegansour...

B12 deficiency anemia:

http://www.webmd.com/food-recipes/guide/...

List of foods with B12

http://ods.od.nih.gov/factsheets/Vitamin...

B12 is not a standard label vitamin and vegans should be looking for foods with B12 supplements. Even vegetarians can get B12 shortage.

The only one I can think of is Vaginitis