Which is added to foods to prevent spoilage and increase shelf life?
List of Foods Without Coloring & Preservatives. Organic, cage-free eggs have no additives or preservatives. Photo Credit Free range eggs image by Justin Hall from Fotolia.com. Preservatives are added to foods to increase shelf life and prevent early spoilage from bacterial growth.ead product labels carefully as many frozen or canned vegetables have added preservatives to increase their shelf life or boost taste and texture. Fresh or frozen vegetables that have only the vegetables listed without added salt and sugars are better selections. Purchase organic varieties when possible.