ESTIMATION OF FREE FATTY ACIDS, PEROXIDE VALUE AND TRANS FATTY ACIDS IN REHEATED AND REUSED OILS OF DEEP FAT FRIED STREET FOODS

LAYAM ANITHA, Pooja Mandlik, Sunitha Raju

Abstract


Background: In India street foods are not only imparting the taste, but also forming a big sector in the society as a less expensive food source. Hence it is important to ensure the effects of  oils used by street food vendors on the consumer health. As a major concern, Free Fatty Acids, Peroxide Value and Trans fats in reused oil is estimated to check the safety for the consumption of these street foods.

Objective: The objective of the study was to estimate Free fatty acids, Peroxide value and Trans fatty acids in reused and reheated oils and to compare with global and Indian standards.

Materials and methods: Reheated and reused oil samples were pooled from 6 areas of Vishakhapatnam, AP, India and estimation of Free Fatty Acids, Peroxide Value by titrimetry and Trans fats were estimated by extraction of fat, methylation and gas chromatography method.

Results: Randomly pooled deep fat fried oil samples from street vendors of Vishakapatnam city from selected areas showed Trans fatty acids <1.0% for all samples. However the fresh oil sample from PDS shown highest value which is nearer to <1.0% i e., 0.93%. The standards compared for estimation were fatty acid methyl esters.

Conclusion: Rearrangement of cis- trans isomers occurs during reheating and reusing the oils which lead to increase in the Trans fatty acids in oils. According to the WHO standards, TFA intake should be less than 1% of the total energy intake.  Hence more strict legislative measures are required, as Trans fats have shown ill effects on health. In view of a public health concern issue, it is important to have proper standards for street foods especially with respect to oils and consumer awareness through labeling will help to reduce the risk of cardiovascular diseases.

Key words: Trans fatty acids, Street Food, Reused and reheated oils, Food safety.


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ISSN : 2251-1563