I am not sure where you live but I shop at Costco and they have a powdered protien shake that has 17G of protien I like the Vanilla and use the food flavorings like Rootbeer,cherry,orange there are so many to choose from and without the huge cost of getting flavored protien shakes. I went on opti fast 10 years ago and lost 100 lbs and gained it back. I was banded Sept 26,2008 and have lost 50 lbs it has been a great tool. Just remeber it is a tool not the solution. I really have had some challenges trying new foods that are healthy and not full of fat. My advise is to Stick with the doctors orders. That was the advise given to me and it has worked well.