I've just gotten through reading Schwarzbein and I am certain that Stevia is allowed; it is natural -- a plant product -- and doesn't affect blood sugar. I bought some (be careful what it's mixed with); it's tasty in my decaf coffee (with heavy cream) at work. Since we can't have desserts, a wonderful treat is a Starbuck's decaf latte made with whipping cream. Before they top the espresso with the foamed cream, give them your bottle of Stevia and ask them to add however many drops you use. It's pure decadence!