NATREN, Inc., headquartered in picturesque Westlake Village, California, is the leading manufacturer of probiotics worldwide. Internationally recognized for its pioneering work and research in the nutritional supplements industry, Natren produces the finest quality probiotics, or "beneficial bacteria". With humble beginnings in the home of husband and wife team, Yordan and Natasha Trenev, Natren was destined for success because of Natasha Trenev's background. Her family supplied yogurt to King Peter II and continuing generations of the royal family of Yugoslavia, where she was born. Natasha's parents decided to come to the United States when she was eight years old.