Lifetime Maintenance
Atkins diet lifetime maintenance phase allows Atkins diet food choice selection from a wide variety of Atkins diet food allowed while still controlling carbohydrate intake to ensure weight maintenance and a sense of well-being, for a lifetime.
This phase is intended to carry on the habits acquired in the previous phases, and avoid the common end-of-diet mindset that can return people to their previous habits and previous weight. Whole, unprocessed food choices are emphasized, with the option to drop back to an earlier phase if you begin to gain weight.
-Wikipedia, Atkins Diet