A possible listeria contamination has led to a recall of several flavors of Nature Valley Granola Bars. According to 9 News, 4 flavors of Nature Valley Granola Bars have possibly been affected due to them containing sunflower kernel's supplied by SunOpta. There have been no reports of any consumers becoming ill in relation to the possible contamination. Customers that think they may have purchased the recalled products can contact General Mills at 866-896-4365 or by visiting generalmills.com/sunflowerseeds. The voluntary recall includes these products and package counts: Nature Valley Protein Chewy Bar: Honey, Peanut & Almond with Pumpkin Seeds, 5-count package, Nature Valley Protein Chewy Bar: Peanut, Almond & Dark Chocolate, 5-count package, Nature Valley Simple Nut Bar: Roasted Peanut & Honey, 4-count package, Nature Valley Simple Nut Bar: Roasted Peanut & Honey, 16-count package, Nature Valley Simple Nut Bar: Almond, Cashew & Sea Salt, 4-count package, Nature Valley Simple Nut Bar: Almond, Cashew & Sea Salt, 25-count package.