Natren, a Ventura County Based Probiotics Manufacturer, Launches the “Locally Grown” Campaign to Educate Consumers About Benefits of a Customized Diet, Exercise and Probiotic Regimen Westlake Village, Oct. 05, 2017 (GLOBE NEWSWIRE) -- Based in Westlake Village since 1990, Natren is a leading manufacturer of pharmaceutical grade probiotic products. Known as The Probiotic Pioneer,...