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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.
In context to food preservation foods are classified as perishable, (meat, fish, milk fruits and some vegetable), semi perishable (eggs, onions, potatoes, carrot, beans) and non-perishable (cereals, pulse nuts). Foods are spoilt by the action of: (1) Micro-organisms (2) Enzymes and (3) Insects.1. Micro-organisms: The micro-organisms responsible for food spoilage are moulds, yeast and bacteria. Moulds: Moulds are in the form of threads developed on perishable foods and are easily visible to the eye.They contain spores which can spread through the air and start new mould plants.ood spoilage refers to undesirable changes occurring in food due to the influence of air, heat, light, moisture, which foster the growth of microorganisms.