Olive oil has enjoyed a remarkable reputation for decades.
Mention the Mediterranean diet and most people immediately think of olive oil. It is often described as one of the healthiest fats you can cook with, supported by studies linking traditional Mediterranean eating patterns with improved cardiovascular outcomes.
But there is an uncomfortable truth that is increasingly being discussed by food scientists, regulators and investigative journalists.
A large portion of the olive oil sold around the world today is not the same product that built that reputation.
And the distinction matters.
The Question Millions of People Are Searching
One of the most common cooking oil questions online today is simple.
“Is olive oil actually healthy?”
The honest answer is that it depends heavily on which olive oil you are talking about.
Traditional olive oil is a mechanically extracted oil from fresh olives. In its best form, known as extra virgin olive oil, it is produced without chemical refining and retains natural compounds such as polyphenols and antioxidants.
However, global demand for olive oil has exploded in recent decades.
The International Olive Council estimates global consumption exceeds three million tonnes per year, far beyond what traditional production systems were originally designed to supply.
When demand grows faster than supply, industries adapt.
Sometimes in ways consumers do not realise.
The Industrialisation of Olive Oil
As olive oil became more popular worldwide, large scale producers developed ways to increase supply, stabilise products and reduce costs.
In many cases this involves refining lower grade oils.
Refined olive oil can be produced by processing oil that has become oxidised, rancid or otherwise unsuitable for direct consumption. Through industrial refining techniques including neutralisation, bleaching and deodorisation, the oil can be stripped of unwanted flavours and impurities.
The result is a neutral oil that can be blended with small amounts of virgin olive oil and sold simply as “olive oil.”
From a regulatory perspective this is allowed.
But nutritionally it is very different from fresh cold pressed oil.
Refining removes many of the phenolic compounds that are responsible for olive oil’s widely discussed health benefits.
This is one reason nutrition researchers often specify extra virgin olive oil when discussing the Mediterranean diet rather than generic olive oil products.
The Fraud Problem
Olive oil has also been the subject of numerous fraud investigations around the world.
Because high quality extra virgin olive oil commands a premium price, it has historically been vulnerable to adulteration and mislabelling.
Several studies and regulatory investigations have documented cases where products labelled as extra virgin olive oil contained:
• lower grade refined olive oils
• other vegetable oils
• blended oils mislabelled as premium products
A widely cited study from the University of California Davis Olive Center found that around 69 percent of imported olive oil samples labelled extra virgin failed to meet international standards for extra virgin classification when chemically tested (UC Davis Olive Center, 2010).
More recently, Europol and Interpol have reported large scale food fraud operations involving olive oil substitution and mislabelling as part of international investigations into counterfeit food products.
These issues do not mean the entire olive oil industry is compromised. Many excellent producers exist, particularly among smaller and regional operations.
However they do highlight a simple reality.
The words “olive oil” on a label do not guarantee the product consumers think they are buying.
Why Processing Changes the Health Equation
The health reputation of olive oil is largely linked to compounds naturally present in fresh olives.
These include:
• polyphenols
• tocopherols
• monounsaturated fatty acids
Polyphenols in particular are often cited for their antioxidant and anti inflammatory properties.
But these compounds are sensitive to heat, oxygen and industrial processing.
Refining stages such as deodorisation can dramatically reduce phenolic content, which is why refined oils often have milder flavour but also reduced nutritional complexity.
A review published in Nutrients (2018) highlighted that phenolic concentrations are significantly higher in extra virgin olive oils compared with refined olive oils.
This means the health narrative surrounding olive oil applies most strongly to oils that remain minimally processed and freshly produced.
The Simpler Alternative
When people start asking whether olive oil is healthy, they are often really asking a deeper question.
How do I know the oil I am cooking with is genuine and minimally processed?
One answer is to look for oils produced through mechanical pressing with minimal refinement.
Nut oils such as macadamia oil naturally lend themselves to this approach.
Macadamias contain around 75 percent monounsaturated fats, a composition similar to olive oil but with the advantage that the oil can be extracted through cold pressing without the need for complex refining stages.
When produced as an unrefined oil, macadamia oil retains its natural fatty acid profile and subtle flavour without the industrial processing steps used in many large scale edible oil systems.
Why Provenance Matters
As global food supply chains grow more complex, knowing where a product comes from becomes increasingly valuable.
Shorter supply chains and locally produced foods provide greater transparency around production practices.
Australia happens to be the natural home of macadamias. The tree is native to eastern Australia and remains one of the country’s most distinctive agricultural products.
For consumers interested in oils that are:
• minimally processed
• traceable to origin
• mechanically extracted
cold pressed macadamia oil offers a compelling alternative to highly industrialised global oil markets.
The Real Takeaway
Olive oil earned its reputation through centuries of traditional production and consumption.
But the modern global oil market is very different from those historical origins.
Understanding the difference between refined oils and genuinely cold pressed oils is becoming essential for anyone trying to make informed choices about cooking fats.
For many people the goal is not simply choosing between one oil and another.
It is choosing oils that are closest to their natural state, produced with minimal intervention and clear provenance.
That is where cold pressed oils, including unrefined macadamia oil, continue to stand out.