Juice with no added sugar

This last year, all the juices I canned were sugar free. My doctor told me my blood sugar level was so high as be almost diabetic, so now I use no sugar. I have found sugarless fruit juices to be quite palatable-although it took me a while to get used to them and some such as cranberry juice and black currant juice really are just too sour. Including crabapple juice makes a big difference, especially Dolgo crabapple. Our blackberry/ Whitney crabapple juice is excellent and most of the very tart berries mixed with crabapple are good. Sadly, the two spotted fruitfly ruins alot of these berries and the Dolgo crabapples.