The FDA announce this week that six brands of almond butter and peanut butter, including Trader Joe’s and Whole Foods private labels, are being recalled because of potential Salmonella contamination.The nut butters, made by nSPIRED Natural Foods, are packaged in glass and plastic jars and have “best by” dates ranging from December 2014 to July 2015. Some products to watch out for: MaraNatha almond butter and peanut butter (34 different varieties and sizes), Arrowhead Mills organic peanut butter, Kroger No Stir creamy almond butter, Safeway Open Nature almond butter, Trader Joe’s raw almond butter, and Whole Foods 365 roasted almond butter.Four cases of illness have been reported that may be associated with these products, according to the Food and Drug Administration. The recall is voluntary on the part of the manufacturer and nSPIRED is working with customers and retailers to remove and destroy potentially tainted products from store shelves and warehouses.If you have any of these nut butters at home, check the date on the top of the lid and throw away any jars with “best by” or “use by” dates in the range above. (Or skip that step and just toss them out straight away.) Symptoms of Salmonella poisoning can include fever, diarrhea (possibly bloody), nausea, vomiting and abdominal pain. The FDA warns that “in rare circumstances, infection with Salmonella can result in the organism getting into the bloodstream and producing more severe illnesses such as arterial infections (i.e., infected aneurysms), endocarditis and arthritis.”The company is offering replacements or refunds to customers who call them at (800) 937-7008.MORE: How to Interpret Those Confusing “Sell By” and “Use By” Dates