My HbA1C reduced from 49 to 36 through 5 months on LCHF. I wanted to lose the sweet tooth rather than feed it with fake chemicals, so tried to abstain from anything sweetened. (I'd say I achieved 80% success) That way the natural sweetness of the food comes across (for example double cream, or some veggies). I therefore avoid sweeteners, but still occasionally use xylitol (Total Sweet) - maybe once a week. I used to use it in mug cakes (and realised I don't really enjoy them so haven't made them in a while), but still add it to tahini (for halva-like dessert) and chai tea (with almond milk and lots of spices). Oh, and when making jellies or panna cottas, which I haven't done since the summer.