Can peanut oil with an off smell due to long storage still be consumed?
Sep 20, 2024
Source: Cainiu Health
Dr. Yang Ziqi
Introduction
Peanut oil that has developed an off odor over time should not be consumed, as it may easily cause physical discomfort. The unpleasant smell in peanut oil after prolonged storage is usually the result of oil oxidation or rancidity, during which the oil produces a foul rancid odor and generates low-molecular-weight aldehydes, ketones, and other compounds. Consuming rancid peanut oil may irritate the gastrointestinal tract, leading to symptoms such as nausea, vomiting, and stomach discomfort.
Under normal circumstances, peanut oil that has developed an off odor due to prolonged storage should not be consumed, as it may cause physical discomfort. The specific analysis is as follows:
Peanut oil developing an unpleasant smell after long-term storage is usually the result of oil oxidation or rancidity. At this stage, the oil produces a foul rancid odor and generates low-molecular-weight aldehydes, ketones, and other compounds. Consuming such spoiled peanut oil may irritate the gastrointestinal tract, leading to symptoms such as nausea, vomiting, and stomach discomfort. In severe cases, it may even cause electrolyte imbalances, dehydration, and pose a threat to health. Therefore, peanut oil that has developed an off odor due to extended storage should not be eaten to avoid adverse health effects.
It is recommended to store peanut oil in a cool, dry, and dark environment, ensuring the container is well sealed to prevent oxidation. Additionally, regularly check the color and smell of the oil. If the color darkens or any unusual odor develops, discontinue use immediately and discard the oil to ensure food safety.
