Staying longer on the 7 Super cut keto Day Diet Plan can pose serious health risks. What Food Types Can You Eat? When you go through the 7 Day Diet Plan, you will only be allowed to consume vegetables, fruits, lean meat, and skim milk. You also need to drink at least eight glasses of water per day unless otherwise stated. Do not drink any alcoholic beverages. Using salt is also discouraged, although you can use vinegar, mustard, ketchup, and soy sauce.