Food Preferences is a great feature, but it only flags the item for easy reference when building a plan. The system doesn't automatically exchange the food for another or filter according to likes or dislikes. When you have items flagged in your client's plan, you can easily use the Food Swap feature to exchange the item for another or, if you have the Professional Edition, you have full editing capabilities to customize the meal. Food Preferences allows you to easily create the plan your clients need.