One possible change to diet can be the introduction of probiotics into the diet. Studies going back as far as 2008 have demonstrated benefits such as changes in the amount of fat around the abdomen, BMI, and imporved digestion. This article collects several of the studies that have been researched over the years to discern the benefits of probiotics.
A little bit of backgorund on probiotics: Probiotics are types of bacteria that are found in fermented dairy and soy products, such as yogurt. These bacteria can contribute to the breakdown of foods in the digestive tract, such as the small intestine, and aid the absorbtion of beneficial nutrients while eliminating many food-born ailments such as high cholesterol.
I recommend getting some of the smoothie products as a dietary supplement, such as Kefir and other yogurt smoothies. Adding some of these products may make a difference in how your body responds to food, such as making you feel more full. Try it out and leave your comments about any results you may have found.