Natren, Inc. is the leading manufacturer of probiotics worldwide, based out of Westlake Village, California. Recognized for their research in nutritional supplements, Natren produces the finest quality of probiotics, which they call "beneficial bacteria."Natren began in the home of Yordan and Natasha Trenev. Natasha had both a business background and a background in bacteria, something Yordan supported. Starting out in their home, today Natren owns the facility they do all of their manufacturing in. Natren has been around for over 25 years and has grown to hold a product catalog of more than 70 items. [+]