How long does olive oil last – opened and unopened?

How long does olive oil last and at what point does a high-quality cooking oil lose its healthy ingredients? Extra virgin olive oil is one of the most valuable and healthiest natural products of Mediterranean cuisine. However, unlike a heavy red wine that matures for years in a cellar, authentic olive oil is a fresh fruit juice. The clock starts ticking from the moment of gentle cold extraction in the oil mill.

Many consumers ask themselves the same questions in everyday life: How long does olive oil last – unopened and after the first opening? How do you store olive oil correctly in the home kitchen, and how can you tell if an oil has become rancid? In this producer guide, we answer all questions regarding shelf life, optimal storage temperature, and freshness.

How long does olive oil last in the unopened bottle?

A high-quality, single-variety extra virgin olive oil has a shelf life of at least 18 to 24 months from the time of harvest when kept in the unopened, light-protected original bottle.

How long olive oil lasts depends significantly on its quality: Natural polyphenols (secondary plant compounds) act as the oil’s own protective shield. The higher the polyphenol content of the harvested fruit (as with our single-variety Koroneiki olive), the more resistant the oil is to premature oxidation and aging.

How long does olive oil last after opening?

As soon as you open the seal for the first time, oxygen reaches the oil and the natural aging process begins. An opened bottle of extra virgin olive oil should ideally be consumed within 3 to 4 months.

Even after 6 months, the oil is generally completely safe for consumption. However, over time it gradually loses its fresh grass aroma, its pleasant bitter note, and a portion of the heat-sensitive vitamins.

The 4 Enemies of Olive Oil: How to store olive oil correctly?

To ensure the answer to the question “how long does olive oil last” always works in your favor, you should consistently protect your cooking oil from four environmental factors:

• Light: UV rays and bright artificial light break down the chlorophyll contained in the oil and dramatically accelerate rancidity. Never buy olive oil in transparent clear glass or plastic bottles and always store it in a cupboard protected from light.
• Heat: The ideal storage temperature is between 14°C and 18°C. Never place the bottle directly next to the stovetop, the oven, or on the windowsill.
• Oxygen: Reseal the lid or the pourer airtight immediately after each use.
• Moisture: Protect storage canisters and bottles from damp cellar floors.

Should olive oil be kept in the refrigerator?

No, olive oil definitely does not belong in the refrigerator. At temperatures below 7°C, the natural fatty acids in olive oil begin to crystallize – the oil flocculates, becomes cloudy and solid. Although it liquefies again at room temperature without permanent chemical damage, the constant cooling and warming harms the delicate aromatic nuances.

How can you tell if olive oil is bad or rancid?

You can reliably identify an over-stored or spoiled olive oil using two senses:

• Smell test: A bad oil loses the scent of fresh grass and instead smells musty, waxy, or reminiscent of old lipstick, wall paint, or rancid walnuts.
• Taste test: Instead of the typical, pleasant fruitiness and the slight peppery kick in the throat, rancid oil leaves a sticky, oily-greasy, and dull feeling in the mouth.

Freshness Guarantee at Terra & Tree

At Terra & Tree, we fill our single-variety Koroneiki olive oil from Kolindros Pieria exclusively into heavy, dark UV-protective bottles and store our supplies at a constant cool 15°C in our German warehouse in Frankfurt am Main. This is how we guarantee maximum shelf life and unadulterated harvest freshness on your dining table.