Why Does Cooking Oil Go Bad?

 

Image Source:- Testo India

Cooking oil gets contaminated with repeated use and as you reheat it repeatedly. The more times you boil and use regular oil, the more it gets contaminated. The oil changing its color to black and getting a rotten smell indicate the oil getting contaminated. Let's understand more about reused cooking oils and essential measures.

How and why does cooking oil go bad?

Reusing oil changes its chemical composition. This newly formed chemical composition produces harmful substances that are not good for your health.

As the oil is being used, reactions like hydrolysis, oxidation, and polymerization are initiated. These repeated reactions produce fat degradation substances called total polar materials (TPM).
As the TPM multiplies, so does the cooking oil start tasting and smelling bad, signifying the oil to become rancid.

It would be best to use a digital frying oil monitor to measure TPM in the oil to prevent contaminating it.


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