The 7 Day Diet:

Monday: eat all the fruit and vegetables you want, but no bananas.
Tuesday: eat all the veggies you want.
Wednesday: eat all the fruit and veggies you want.
Thursday: 5 bananas, 5 glasses of milk.

Friday: 4-3oz steaks of beef or chicken with fresh veggies.
Saturday: 4-3oz beef steaks with veggies.
Sunday: 4-3oz beef steaks with veggies.
Lose up to 14 pounds.

Reality: Can you say gimmick diet? How fast is any weight loss coming back? Fast. The 7 Day Diet is a bad short-term solution.