Choosing whole grains over refined grains should be a part of any diet — detox or not. Besides being full of nutrients and antioxidants, they're incredibly high in insoluble fiber, which helps keep you regular. If you're trying to flush the body of toxins, the last thing you need is to be bloated or constipated. Quinoa, in particular, is also good source of potassium, which has also been shown to prevent the bloat.
After banishing the bloat, you'll be happy to hear that individuals who make whole-grain foods a part of their regular diet have shown a decrease in waist size.