D-mannose is a simple sugar that your body uses to help clean the urinary tract and maintain a healthy bladder lining. It is metabolized only in small amounts, and excess amounts are quickly excreted in the urine, so it will not interfere with health. When taken regularly, D-mannose promotes normal urinary tract function by cleaning and maintaining the health of the bladder lining. It is recommended to take 1 level teaspoon 1 to 2 times a day. Take it with water or unsweetened juice, such as unsweetened cranberry juice. Keep the bottle tightly closed at all times between uses. Store in a cool, dry place after opening.