The Foodin birch sugar belongs to the elite of sweeteners. Finnish birch sugar, or xylitol, is a completely natural table-top sweetener. Its glycemic index is only seven, which means that it raises blood sugar very slowly. The xylitol contained in birch sugar promotes dental health, making it the perfect substitute for regular sugar. Its sweetness and structure is very similar to white sugar. How to use birch sugar Birch sugar can be used just like regular sugar. It withstands heating well and is therefore well suited for baking. May act as a laxative.