Atkis is not a high protien diet. It is only an adiquet protien and high fat diet. Yes you can eat to much protien which is hard on the kidneys and will convert to gluclose just as carbs will. If your getting 70% from fat though, there is a really good chance you aren't eating too much protien. The only time I've seen anyone that maybe could of worries was one member who was eating almost 450g of protien a day, and that made up more then 50% of their overall calories.