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We consume various types of foods to provide nutritional support to our organism. Food comes from plants and animals and contains necessary nutrients such as carbohydrates, proteins, fats, minerals, or vitamins. Food is a substance which can be ingested, digested, and assimilated through the human body. Food can be classified into various groups on the basis of its perishability, nutritional value, sources, etc. Classification of food on the basis of self-life of food products decided its perishability, Self-life is the period from harvesting to product quality devastating to unexpectable level. Foods can be classified on the basis of their perishability into the following groups: perishable foods the foods which deteriorate (spoil) quickly after harvest or slaughtering are called perishable foods. Generally, perishable foods contain high moisture. It includes vegetables, soft fruits, meat, poultry, fish, etc. Semi-perishable foods contain natural inhibitors to delay spoilage. The category of these food includes root vegetables, honey, etc. The moisture containing these foods ranges from 20 to 70%. Non-perishable foods, the food does not spoil readily contains moisture lesser than 15%. This category of food includes nuts, resins, cereals, etc.
