During Week 1 you should eliminate all starchy carbohydrates, including snacks such as crackers, bread, nuts, and nut butters.
[Link to Snack Options]
You can have two snacks a day—ideally, one in midmorning and one between lunch and dinner. The goal is to scatter your snacks between your meals so you are eating every three to four hours. If you go too long without eating, your metabolism will slow and you will arrive at your next meal so hungry that it will be difficult to control your portions. When your metabolism is slow, food is more easily stored as fat.