I was thinking about your question but have no research to back me up.Using common sense I don't think you would run into any problems as long as you consumed all the essential nutrients. Our prehistoric ancestors would not have had a lot of variety in food products and they seemed to have thrived. I had a friend that went on a starvation diet to lose weight. He lost well over 100 lbs in a rather short time. He ended up with a vitamin deficiency (probably B6) and developed problems with his nerves in the lower extremities. The medical term for his problem was peroneal palsy or foot drop. Nothing like that should happen to you if you if the diet is balanced between carbs, fats, and protein. You should probably take a multiple vitamin to make sure you don't get a vitamin or mineral deficiency. The chance of missing a nutrient would be higher if you did not have a variety of food intake so you need to be careful. I get totally confused about what percent protein should be in the diet versus fat versus carbs. Ask this question and your get all kinds of conflicting opinions from RJ members
Just curious why are you considering this type of diet. Would it not be boring?