The Mayo Clinic diet works by supposedly introducing lifelong healthy habits. Initial weight loss is largely due to caloric intake and eliminating processed foods. Dieters are also encouraged to eat whole grains, fruits, vegetables, and exercise. The second phase is meant to teach dieters to continue practicing these healthier habits, while continuing to lose small amounts of weight — the calorie restriction is lifted, sweets and junk food are reintroduced in small amounts, and new habits are intended to be maintained.