This method of dieting is becoming more popular, and chances are you've heard of it. If you've done any study on IIFYM and Flexible Dieting in the past, you may have discovered that no foods are forbidden. There are no food categories that are designated as healthy or harmful for you. What counts in this kind of dieting is if your macro budget allows you to consume the items you want to eat. If that's the case, you're good to go!