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If you cook with sesame oil, it’s important to be aware of signs of rancidity, as sesame oil has a much shorter shelf life than other plant-based oils. If you're concerned with the condition of your sesame oil, take note of its color, odor, and flavor in order to determine whether or not your sesame oil is safe to consume.
Steps
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Check your oil for a dark, amber color. Sesame oils that appear darker in color than usual - a deep amber hue as opposed to a light golden color - are often rancid. Compare the color of your oil to images of sesame oil online to determine whether or not your oil is rancid. [1] X Research source
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Feel the bottle to see if it's sticky. A sticky residue will develop on the outside of a rancid oil container. If your bottle of sesame oil is uncharacteristically sticky, this is likely a symptom of rancidity. [2] X Research sourceAdvertisement
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Note a harsh, acrid smell. Fresh sesame oil has a fragrant, nutty odor. In comparison, rancid oil smells acrid, bitter, and soapy. Give your oil a whiff, and if the smell is harsh on your nose, it’s probably best to throw it out. [3] X Research source
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Taste the oil for signs of bitterness. If the sight and smell of your oil are not telling enough, try tasting a tiny amount of your sesame oil to determine once and for all if the oil is rancid. If the oil tastes acrid or bitter, it is rancid and unsafe to cook with. [4] X Research source
- If you decide to taste-test your sesame oil, consume no more than a drop in case the oil is rancid.
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Check the “Use By” date on the bottle. If your sesame oil displays any physical signs of rancidity, and if the oil’s “use by” date is long past, it’s safe to say your oil is probably rancid. If the "use by" date has passed but your oil looks, smells, and tastes fresh, it's probably fine to use the oil. [5] X Research source
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Throw away any sesame oil that's over 2 years old. Most sesame oil will stay fresh for no longer than 2 years, regardless of its storage conditions. Keep these guidelines in mind when you inspect your sesame oil for signs of rancidity to determine the likelihood of its freshness. [6] X Research source
- Unopened sesame oil will stay fresh for up to 1 year when stored at room temperature, and up to 2 years when refrigerated.
- An opened container of sesame oil will stay fresh for 6-8 months when left at room temperature, and up to 2 years when refrigerated.
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Inspect the storage environment of your sesame oil. If your bottle of sesame oil has been left open and/or in direct sunlight for longer than 1-2 months, and you notice a change in its color or odor, it's best to throw it away. These storage conditions often cause sesame oils to go rancid. Practice safe storage techniques to prevent rancid oil in the future. [7] X Research source
- Sesame oil stays fresh for longest when it is sealed tightly and stored in a cool, dry location, away from direct sunlight or other sources of heat.
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Community Q&A
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QuestionCan I use rancid sesame oil for skin or hair?Maggie PetersonCommunity AnswerNo, if it is rancid it has bacteria in it that will not be good for your skin or hair. It will also smell bad.
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Tips
- If you suspect that your sesame oil is rancid, play it safe and throw it away. Rancid oil is not just gross, but can make you sick. [8] X Research sourceThanks
- If you don’t use sesame oil very frequently, consider buying it in small quantities to avoid the possibility of its spoilage [9] X Research sourceThanks
- While sesame oil stays freshest when stored in the fridge, it will stay relatively fresh in pantry, so long as it’s protected from sunlight. [10] X Research sourceThanks
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References
- ↑ http://www.epicurious.com/expert-advice/is-oil-rancid-bad-for-you-article
- ↑ http://www.epicurious.com/expert-advice/is-oil-rancid-bad-for-you-article
- ↑ http://www.epicurious.com/expert-advice/is-oil-rancid-bad-for-you-article
- ↑ http://imaddictedtocooking.com/does-sesame-oil-go-bad/
- ↑ https://www.nytimes.com/1983/02/19/style/touch-of-rancidity-can-spoil-the-feast.html
- ↑ https://www.eatbydate.com/other/condiments/how-long-does-oil-last/
- ↑ http://imaddictedtocooking.com/does-sesame-oil-go-bad/
- ↑ http://www.epicurious.com/expert-advice/is-oil-rancid-bad-for-you-article
- ↑ https://www.nytimes.com/1983/02/19/style/touch-of-rancidity-can-spoil-the-feast.html
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