I recently bought Now D-Mannose on Amazon, which is 100% D-Mannose powder. The only directions it has is to take 1 to 2 servings per day (which is 1 level teaspoon or 2 grams) as a "dietary supplement". I didn't buy it for that. I bought it to finally get rid of this UTI that I've had for well over a week now. Has anyone ever taken D-Mannose, especially Now D-Mannose? Any suggestions on how often I should take it?