What is Rancidity and How it can be Prevented

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Rancidity Meaning The word rancidity refers to the spoilage of food.

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Whenever food materials are placed in the open air, the fat and oil present in the food materials are oxidised.

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[{"selector":"#anim-e4d85574-d4d1-432e-a07b-204b5236f660","keyframes":{"opacity":[1,1]},"delay":0,"duration":1600,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-e4f1d873-f9ee-41af-bf3b-e40d574d2785","keyframes":{"transform":["scale(3)","scale(1)"]},"delay":0,"duration":1600,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] Types of Rancidity Rancidity is divided into three types. Hydrolytic rancidity Oxidative rancidity Microbial rancidity

- Hydrolytic Rancidity is caused by lipase enzymes of bacterial origin. - Short-chain fatty acids change the flavour and aroma of food. Examples: Sour milk.

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Oxidative Rancidity Oxidative Rancidity is caused by ketones and aldehydes. This may occur in the presence of heat, Oxygen and heavy metals.

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The colour and taste of potato chips change when they are exposed to air and light.

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Microbial Rancidity is caused by microorganisms in the presence of water. Example: Spoilage of food by bacteria and fungi.

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Effects of Rancidity Rancid food materials produce a bad smell and have an unpleasant taste.

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Effects of Rancidity Rancid oils have free radicals, which may increase some diseases like cancer and heart diseases.

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Rancidity can be prevented by storing food materials in airtight containers.

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Rancidity can be prevented by adding antioxidants to food materials.

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Rancidity can be prevented by filling food containers and packets with Nitrogen gas.

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