eurorides, sorry, but a 0 carb diet is a very bad idea. I'm a keto diet advocate, however it should be obvious that some roughage and raw veggies should be included in ANY diet, which will add some carbs. Some people (rare, and usually extremely overweight) must go as low as 15 g of carbs a day to get into ketosis, however some people can go as high as 100+, as long as they are low gi carbs and get into keep ketosis.
LK, yes naturaly peanutt butter is an excellent choice, just make sure to count the carbs. 4.7 g for every 2 tbs. Those are the absorbable carbs. Make certain to leave some carb grams for your veggies every day.