Does unopened polenta go bad?

Refrigerate stoneground polenta in a resealable airtight container for approximately two months. Stoneground polenta contains oil from the germ of the corn and will spoil if left unrefrigerated. Place unopened and uncooked leftover fine-ground polenta in a cool, dry area away from moisture for up to two years.Click to see full answer. Thereof, is it OK to use out of date polenta?2 Answers. Yes, it can go bad. It’s pretty much the same as the way flour can go bad: the fats can go rancid. Grains are mostly starch, but they contain enough fat for rancidity to be a noticeable problem.Likewise, can old cornmeal make you sick? If it smells rancid or sour, it’s past its prime, and you should discard it. Another thing to remember is that black and grey specs in whole-grain cornmeal are normal. Those flecks can be attributed to the germ of the corn. Other than that, you should use the guidelines for degerminated corn. Considering this, does unopened cornmeal go bad? There is a “best if used by” date rather than an expiration date. This means there is an opportunity to extend the shelf life of cornmeal; if it’s stored under good conditions, cornmeal will keep for about one year.What happens if you eat rancid cornmeal?Like for instance, the cornmeal will lose some of the natural corn flavor as well as the natural oil in it that acts as the natural preservative which turns rancid and could lead to an off flavor of the cornmeal. Aside from that, once properly stored in airtight containers, cornmeal might hold the color and texture.