Now Foods, D-Mannose Pure Powder, 6 oz (170 g)Healthy Urinary Tract Cleanses the Urinary Tract Non GMO A Dietary Supplement Vegetarian Vegan Kosher General Health Family Owned Since 1968 GMP Quality Assured D Mannose is a naturally occurring simple sugar that is metabolized only in small amounts by the body, with the remainder being rapidly excreted with the urine. In the urinary tract, D Mannose interferes with particle attachment and allows everything to be flushed out in the urine stream.