Question

What is Rancidity? Mention four ways to prevent it.

Answer 1

Hint: Consuming rancid food nowadays is one the major causes of bad health. When fats and oils are oxidized in the presence of air, they become rancid and their smell and taste change. This phenomenon is called rancidity. Food items such as chips are flushed with nitrogen so that they can be utilised after a lengthy period of time.

Complete answer:
Rancidity is the oxidation of oils or fats in food that results in a foul odour and flavour. It can be avoided by taking the following steps: Antioxidants can be added to foods containing fats and oils to prevent rancidity.
Food that is left over can be stored in the refrigerator. Nitrogen gas should be used to flush the meal. Use airtight containers to prevent air from coming into touch with the food. Keeping food in airtight containers helps to reduce oxidation and extend the life of the food.
Lipid oxidation is one of the most common causes of food deterioration, and it is generated by the reaction of fats and oils with molecular oxygen, which results in off-flavors known as rancidity. Rancidity can also be caused by a mix of enzymes and moisture. Lipid degradation has been a serious issue in the storage of oils and fats since ancient times.
Rancidity is the natural decomposition (degradation) of fats or oils caused by hydrolysis, oxidation, or both. Which can be measured using two simple laboratory tests: Peroxide Value (PV) and Anisidine Value (AnV).

Note:
Although rancidity is a natural process that affects oils, understanding the process and how to test for levels of oxidative chemicals can assist purchasers and formulators in selecting the finest quality oils for use in nutritious products development. Rancidity is accompanied by a significant increase in the acid value of the fat.