Look for a Harvest Date
The age of the oil is important. For many vegetable oils, it’s not possible to find out when they were made. But when it comes to buying olive oil, you can often find the harvest date printed on the label of high-end oils and some supermarket olive oils such as our winners, which are made by Bertolli and California Olive Ranch. Check this date to ensure that you’re securing the freshest bottle possible. Alternatively, some labels cite an expiration date, which producers typically calculate as 18 months from harvesting.