“Ketogenic” is a term for a low-carb diet (like the Atkins diet). The idea is for you to get more calories from protein and fat and less from carbohydrates. You cut back most on the carbs that are easy to digest, like sugar, soda, pastries, and white bread.

Fish and seafood. Low-carb veggies. Cheese. Avocados. Poultry. Eggs. Nuts, seeds and healthful oils. Plain Greek yogurt and cottage cheese.

Eating refined high carb foods like white bread, pasta, rice, and pastries could prevent a ketogenic state if you end up getting more than your daily carb allowance. While these are fine to eat in moderation if you're not following a low carb diet, those looking to achieve or maintain ketosis will need to limit them.