**How Long Does Cooking Oil Last After Opening?**
Cooking oils contain a diverse range of micronutrients, in addition to fat, depending on their source. Different types of fats also have varying effects on health. This is why oils derived from olives, soybeans, sunflowers, and rice bran are popular choices. While fats themselves have a long shelf life, micronutrients can deteriorate quickly, leading to a decline in oil quality over time. Furthermore, environmental factors and improper storage conditions can cause cooking oil to degrade.
How long does cooking oil last after opening? Cooking oil is commonly sold in stores and supermarkets in various container sizes, with a typical shelf life of 18-24 months. However, once opened, the oil’s lifespan shortens significantly. According to nutrition experts, it is best to consume the oil within approximately three months of opening the bottle. Beyond this period, the oil can still be used, but its nutritional value will have diminished.
Additionally, if stored in a humid, dirty, confined, or bacteria- and insect-infested environment, oil that has been opened for too long may spoil, developing an odd or unpleasant odor and taste. Oil that has exceeded its expiration date and is stored improperly may also become contaminated with mold.
How long does cooking oil last after opening? It’s best to use it within approximately three months. (Photo: Istock)
When cooking, if you’ve had the same oil open for a prolonged period, regularly inspect its quality. If you notice any discoloration, strange odors, or unusual tastes, discard it immediately and replace it with a new bottle. Ideally, purchase a quantity that aligns with your family’s consumption habits and needs, ensuring you can finish it within the recommended three-month period after opening.
Signs of Rancid Oil
To check if your cooking oil has deteriorated or gone rancid, consider the oil’s color, clarity, and smell: When the fats in the oil start to break down, they produce a strong, unpleasant odor.
Rancid oil often loses its clarity, becoming cloudy or opaque, and its color may darken or turn black compared to fresh oil.
Storage Tips
To maintain the quality of your cooking oil, remember to
Securely tighten the lid after each use and store it in a cool, dry place, away from direct sunlight. Follow the manufacturer’s storage instructions.
Some oils are recommended to be stored in the refrigerator. Therefore, when purchasing oil, carefully read the label to understand its ingredients, intended use, and the manufacturer’s storage advice.
Do not mix new oil with used oil: If you have leftover oil after cooking, and it is still clean enough for reuse, pour it into a separate container, cover it tightly, and reuse it one or two more times.
Source: VTCnews
