while the raspberries may be okay, they do add carbs. The fruit juice concentrate and tapioca are things that you definitely do not want (sugars and starches). "Natural flavor" could also include things like sugar or honey (hey, they're both "natural" but not low carb).
What you want is full fat (also called whole milk or cream top) unflavored yogurt. I've seen it in a couple of grocery stores where I live, but I'm always guaranteed to find it at my local health food store. You can add the fruit and sweeteners yourself and then you'll know exactly what's in it. Keep looking!