Table of Contents
Table of Contents
Cold-pressed olive oil is one of the most important and most misunderstood quality indicators in the entire world of extra virgin olive oil — a term that appears on labels with increasing frequency but that is genuinely understood by very few of the consumers who encounter it. Understanding what cold-pressed really means, why it matters so profoundly to the quality of the finished oil, and how it differs from the heat-based and chemically assisted extraction methods used by the majority of the world’s olive oil producers is the essential first step toward making genuinely informed choices about the olive oil you use every day.
At Kladion, cold-pressed production is not a marketing claim, a labeling convenience, or a premium positioning device. It is a fundamental, non-negotiable commitment that runs through every single stage of the production process — from the careful hand harvesting of our Koroneiki olives in the high-altitude groves of Palaiokastro, Messinia, to the moment the finished oil is sealed in its dark glass bottle for delivery to your table. It is the commitment that ensures every drop of Kladion PDO Kalamata delivers the authentic, complete, and extraordinary flavor of the Koroneiki variety in its purest and most nutritionally complete form.
In this article we explain exactly what cold-pressed means, why it produces dramatically better olive oil, and the 7 powerful and specific ways in which the cold extraction method preserves and protects the qualities that make truly premium extra virgin olive oil so genuinely exceptional.
What Does Cold-Pressed Actually Mean?
The term cold-pressed describes a specific and precisely defined production method in which olive oil is extracted from the olive fruit using purely mechanical means — crushing, pressing, and centrifugal separation — without the application of heat above 27°C or the use of any chemical substances at any point during the extraction process.
This 27°C temperature limit is the defining and legally regulated threshold that separates genuinely cold-pressed extra virgin olive oil from all lower-quality extraction methods. It is not an arbitrary number — it is the carefully determined temperature above which the most valuable and most delicate compounds in the olive fruit begin to degrade, volatilize, and lose the biological and sensory properties that make them so important. Below 27°C, polyphenols remain stable, aromatic compounds remain intact, and the extraordinary natural chemistry of a freshly harvested Koroneiki olive is fully transferred to the finished oil. Above 27°C, a cascade of quality degradation begins — and the higher the temperature, the more profound and irreversible the damage.
The phrase cold-pressed is often used interchangeably with the term cold extraction — and for practical purposes in modern olive oil production, they describe the same fundamental commitment to temperature-controlled, chemical-free extraction. The International Olive Council provides the definitive regulatory framework for these terms and their application to extra virgin olive oil labeling across European and international markets.
Cold-Pressed vs. Heat-Extracted — Why the Difference Matters
To truly understand why cold-pressed olive oil is so superior, it helps to understand what happens when olive oil is not cold-pressed — when heat is applied during extraction to increase oil yield, reduce viscosity, and speed up the separation process.
When olive paste is heated during extraction — even to temperatures that might seem moderate, such as 35-40°C — the consequences for quality are immediate and significant. Heat accelerates the oxidation of the oil, reducing its polyphenol content and its oxidative stability. It volatilizes the most delicate and most complex aromatic compounds, stripping away the fresh, green, herbaceous character that distinguishes a great extra virgin olive oil from an ordinary one. It degrades the natural color, causing the bright emerald-green vibrancy of freshly cold-pressed Koroneiki oil to fade toward yellows and browns. And it reduces the concentration of the very compounds that give high-quality extra virgin olive oil its distinctive health credentials and its certified nutritional benefits.
The trade-off that producers who use heat-assisted extraction are making is more yield in exchange for lower quality. More oil flows from the olive paste at higher temperatures — but the oil that flows is nutritionally and gastronomically inferior to what cold extraction would have produced. For a family producer like Kladion, committed to quality above all else, this is a trade-off that is simply never worth making.
Reason 1 — Polyphenols Are Preserved at Maximum Concentration
The single most important benefit of cold-pressed extraction — and the reason it is so central to the quality of Kladion PDO Kalamata — is the preservation of polyphenols at their full, natural, maximum concentration.
Polyphenols are the bioactive compounds that give premium extra virgin olive oil its extraordinary health credentials — the natural antioxidants, anti-inflammatory agents, and neuroprotective molecules that make high-quality olive oil a cornerstone of the Mediterranean diet and an object of intense scientific and nutritional interest. The most important polyphenols in Koroneiki extra virgin olive oil include oleocanthal, oleacein, hydroxytyrosol, and oleuropein — compounds of remarkable biological potency whose concentration in the finished oil is entirely dependent on the production method used to extract it.
Heat destroys polyphenols — directly and irreversibly. Studies comparing polyphenol concentrations in cold-pressed versus heat-extracted olive oils from the same batch of olives have consistently found dramatically lower polyphenol levels in heat-extracted samples — with losses that can exceed 50% or more at higher extraction temperatures. By cold pressing at strictly controlled temperatures below 27°C, Kladion ensures that every polyphenol present in the freshly harvested Koroneiki olive is preserved completely intact in the bottle you receive. The peppery sting at the back of the throat when you taste Kladion PDO Kalamata is the direct, immediate, and unmistakable sensory proof of this polyphenol richness — and it is a quality you only find in a genuinely cold-pressed extra virgin olive oil.
Reason 2 — Aromatic Complexity Is Protected Intact
The second powerful reason why cold-pressed extraction produces superior olive oil is the complete preservation of the volatile aromatic compounds that give premium extra virgin olive oil its extraordinary sensory complexity and its immediate, visceral appeal.
The characteristic aromas of a genuinely great cold-pressed Koroneiki extra virgin olive oil — fresh-cut grass, ripe green apple, wild Mediterranean herbs, tomato leaf, and artichoke — are produced by a family of highly volatile organic compounds called aldehydes, esters, and terpenes that are released and begin to develop the moment the olive is crushed. These compounds are extraordinarily delicate and extraordinarily sensitive to heat. At temperatures above 27°C, they begin to volatilize — literally evaporating away from the olive paste and into the surrounding air, taking with them the aromatic complexity and sensory character that define a great extra virgin olive oil.
Cold pressing completely prevents this aromatic loss. By maintaining strict temperature control throughout the crushing and extraction process, Kladion ensures that every aromatic molecule present in the freshly harvested Koroneiki olive is captured and preserved in the finished oil — producing the vibrant, complex, immediately recognizable fragrance that distinguishes Kladion PDO Kalamata from the flat, simple, and largely aroma-free character of heat-extracted oils.
Reason 3 — Naturally Low Acidity Is Maintained
The third reason why cold-pressed production is so decisive for quality is its role in maintaining the naturally very low acidity that is one of the most important and most revealing quality markers of premium extra virgin olive oil.
Free acidity in olive oil — measured as the percentage of free oleic acid present in the oil — is one of the primary indicators of the quality of the raw material and the care of the production process. Genuinely fresh, undamaged olives that are harvested at the right moment and processed immediately by cold extraction naturally produce oil with very low free acidity — typically between 0.1% and 0.3% for high-quality Koroneiki olives like those used by Kladion.
Heat during extraction accelerates the enzymatic reactions that increase free acidity, raising the level above what the raw material would naturally have produced and pushing the oil toward the limits of the extra virgin classification. Cold pressing prevents this artificial acidity increase, ensuring that the exceptionally low natural acidity of the Koroneiki olive is fully reflected in the finished Kladion PDO Kalamata.
Reason 4 — Antioxidant Content Remains Fully Intact
The fourth reason cold-pressed extraction is superior is the complete preservation of the full antioxidant profile of the olive — beyond polyphenols alone — including the fat-soluble antioxidants, vitamin E compounds (tocopherols), and other minor phenolic components that together constitute the extraordinary nutritional richness of premium extra virgin olive oil.
These antioxidants work synergistically — reinforcing and amplifying each other’s protective effects both within the oil itself (protecting it from oxidative degradation during storage) and within the human body (delivering sustained antioxidant protection against the cellular damage associated with aging, inflammation, and chronic disease). Heat destroys these antioxidants with the same ruthless efficiency with which it destroys polyphenols.
Cold pressing preserves them completely, delivering to the consumer the full antioxidant spectrum of the freshly pressed Koroneiki olive — nothing added, nothing removed, nothing degraded. The European Food Safety Authority’s authorized health claim for olive oil polyphenols, which you can verify at EFSA’s official website, is specifically conditioned on consumption of olive oil with a polyphenol content high enough to deliver measurable health benefits — a standard that only genuinely cold-pressed, high-quality extra virgin oils consistently meet.
Reason 5 — Flavor Depth and Balance Are Uncompromised
The fifth reason cold pressing produces better olive oil is the most immediately and personally perceptible one for any consumer: the flavor. Cold-pressed extra virgin olive oil simply tastes dramatically, unmistakably better than heat-extracted oil — and the difference is apparent from the very first taste.
Where cold-pressed Koroneiki extra virgin olive oil delivers a rich, layered, multidimensional flavor experience — opening with vibrant fresh fruitiness, developing through a balanced, pleasantly bitter mid-palate, and finishing with the characteristic warm, lingering peppery sting that signals polyphenol richness — heat-extracted olive oils are typically flat, simple, and largely characterless by comparison. The complexity is gone. The balance is lost. The distinctive personality of the Koroneiki variety — that unmistakable combination of green freshness, bitter depth, and peppery warmth — is reduced to a pale shadow of itself.
For anyone who cooks seriously, eats thoughtfully, or simply appreciates the difference between an extraordinary ingredient and an ordinary one, the flavor argument for cold pressing is the most compelling of all. Read more about how to best use Kladion’s cold-pressed flavor in our recipes and cooking guide.
Reason 6 — Nutritional Integrity from Grove to Bottle
The sixth reason why cold pressing is essential is the one that matters most for health-conscious consumers: the complete preservation of nutritional integrity from the moment the olive is crushed to the moment the oil reaches your table.
Premium extra virgin olive oil is one of the most nutritionally complex and health-valuable foods in the human diet — rich in heart-healthy monounsaturated fats, powerful anti-inflammatory polyphenols, natural antioxidants, and fat-soluble vitamins. But all of these nutritional benefits are conditional on the production method. They exist in the finished oil only to the extent that the production process has preserved them from the raw material. Heat-extracted oils may carry the label “olive oil” but they have sacrificed a substantial proportion of their nutritional potential in the name of yield and efficiency.
Cold-pressed Kladion PDO Kalamata sacrifices nothing. Every gram of oleic acid, every milligram of polyphenol, every molecule of tocopherol and hydroxytyrosol that was present in the freshly harvested Koroneiki olive is present in the finished bottle — because nothing in the production process was allowed to destroy, degrade, or compromise it. For a daily health food as well as a daily culinary pleasure, this nutritional completeness is the ultimate argument for cold pressing. Learn more about how our production process protects this quality in our article on olive harvesting and oil production.
Reason 7 — Cold-Pressed Is the Only Standard for True Extra Virgin
The seventh and most fundamental reason why cold pressing matters is simply this: it is the only production method that can consistently and reliably deliver olive oil that genuinely deserves to be called extra virgin — the highest and most demanding quality classification in the global olive oil hierarchy.
The extra virgin classification requires a combination of chemical and sensory standards that simply cannot be met consistently by heat-extracted or chemically assisted production. Very low free acidity below 0.8%, zero sensory defects, and positive sensory attributes including fruitiness, bitterness, and pungency — the complete extra virgin standard demands exactly the qualities that cold pressing preserves and heat extraction destroys. Every bottle of Kladion PDO Kalamata is independently certified as extra virgin by the rigorous quality testing required for the PDO Kalamata designation — and that certification is only possible because cold pressing is used exclusively, at every stage, without exception. Explore and order directly from our e-shop.
The Kladion Cold-Pressed Production Process — Step by Step
The cold-pressed production process at Kladion follows a precisely managed sequence of stages, each designed to protect and preserve the full quality of the Koroneiki olives from grove to bottle.
The process begins with careful hand harvesting of the Koroneiki olives in the groves of Palaiokastro — ensuring every fruit arrives at the mill undamaged and in perfect condition. The olives are transported immediately to the pressing facility, where they are thoroughly washed before entering the cold-press system. The washed olives are then crushed at temperatures strictly below 27°C to create a smooth, uniform olive paste — the critical cold extraction stage at which all polyphenols, aromatic compounds, and antioxidants are preserved completely intact.
The paste is processed through a continuous centrifugal decanter to separate the oil from the water and solid residue, again entirely without heat or chemical intervention. The extracted oil passes through a final vertical centrifuge for polishing, then through careful filtration to achieve brilliant clarity and full aromatic expression. The finished cold-pressed oil is transferred to dark stainless steel storage vessels, protected from light, heat, and oxygen, until it is bottled in dark glass and sealed for delivery to customers across Europe.
Every step of this process reflects the same commitment: to deliver Kladion PDO Kalamata to your table in the most complete, most authentic, and most extraordinary form that the Koroneiki variety and the groves of Messinia are capable of producing.
Frequently Asked Questions
What does cold-pressed mean on an olive oil label?
Cold-pressed means that during the entire milling and extraction process, the temperature of the olive paste never exceeded 27°C, and no chemical substances were used at any point. This strict temperature limit preserves the polyphenols, antioxidants, and aromatic compounds that define the quality, flavor, and health benefits of premium extra virgin olive oil.
Is all extra virgin olive oil cold-pressed?
No — and this is an important distinction many consumers miss. While all extra virgin olive oil must meet certain minimum quality standards, not all extra virgin olive oil is produced by cold pressing. Some producers use moderately elevated temperatures or chemical treatments to increase yield while technically maintaining the extra virgin classification. Only genuinely cold-pressed extra virgin oils like Kladion PDO Kalamata preserve the full polyphenol content and aromatic complexity that the best extra virgin olive oil is capable of delivering.
How can I tell if an olive oil is genuinely cold-pressed?
Look for the explicit cold-pressed or cold extraction label claim, combined with other quality indicators such as a harvest date (not just a best-before date), a PDO or PGI geographical designation, and a polyphenol content statement if available. The sensory test is also reliable: a genuinely cold-pressed, high-polyphenol extra virgin olive oil will deliver a characteristic peppery sting at the back of the throat — the direct sensory signal of oleocanthal content.
Does cold pressing affect the cooking performance of olive oil?
Cold-pressed extra virgin olive oil is naturally very stable for cooking due to its high oleic acid content and antioxidant richness. It performs excellently for sautéing, roasting, and general cooking at moderate temperatures. To fully appreciate its polyphenol richness and aromatic complexity, it is best also used raw — as a finishing oil, drizzled over dishes at the table, where its extraordinary sensory character is fully expressed.
Why does Kladion use cold pressing exclusively?
Kladion uses cold pressing exclusively because it is the only production method consistent with their absolute commitment to quality — preserving the full polyphenol content, the complete aromatic profile, the naturally very low acidity, and the total nutritional integrity of their Koroneiki olives. Any compromise on this commitment would compromise the quality of Kladion PDO Kalamata — and that is a compromise the Kladion family will never make.