Olive oil packaging usually shows a ‘best by date’ but a ‘harvest date’ is a better indication of its age. Why? Because a producer can keep oil in a tank for years before he bottles it (and the best by date is 2 years after that). The harvest date tells you when the fruit was crushed. So look for a harvest date if you can find one and make sure it’s fresh — harvested no more than a year ago is ideal.
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