Is it healthy to reuse cooking oil?

Is it healthy to reuse cooking oil?


Cooking oil is a staple when it comes to preparing most home-cooked dishes in any kitchen. While it’s always good to discard oil every time we use it, some may wonder whether it may be too much of a waste. So, this begs the question, “How many times can you safely reuse cooking oil?”


While the quality of oil will deteriorate after each use, it is highly recommended that cooking oil should not be reused more than twice.

(Source: Health Promotion Board)



Reusing it more than twice can:

  • Increase exposure to free radicals that can cause cell damage
  • Reduce heat-sensitive vitamins and antioxidants after each use
  • Lead to a change in quality of oil
  • Reduce the smoking points of oil (the temperature at which the oil starts to smoke and break down rapidly)


So what is the proper storage method if you want to reuse oil?

  • Remove any residue such as crumbs after frying by using a strainer or cheesecloth
  • Let the oil cool to room temperature before storing in an airtight container, away from exposure to air and light.


DO NOT reuse the oil if it has turned dark or black, or if it smells rancid and starts to become thick.

(Source: The Straits Times)


So, there you go! Keep this cooking tip in mind as you prepare healthy meals at home. Remember, healthy kidneys start with healthy cooking methods!