Olive Oil Questions | The Ten Answers in Brief

1. How do I recognize high-quality olive oil?

The most important legal starting category for high-quality virgin olive oil is:

Extra Virgin Olive Oil.

This category is legally defined.

The oil must meet:

• chemical requirements
• purity requirements
• as well as sensory requirements

among others.

Key current quality parameters include:

These values are important, but they do not fully explain why two Extra Virgin Olive Oils can be completely different.

For a more comprehensive quality assessment, I am therefore also interested in:

• Origin
• Producer
• Olive variety
• Harvest
• Freshness
• Processing
• Storage
• Sensory profile
• Current laboratory analyses

An acidity level of:

0.20 percent

can be excellent.

But it does not prove alone that:

This olive oil is sensorially better than any other.

The same applies to:

• Polyphenols
• Awards
• Price
• Early harvest

Quality arises from several levels.

How do you recognize good olive oil?

Extra Virgin Olive Oil | What does the quality grade mean?

2. What do polyphenols in olive oil mean?

"Polyphenols" is a common umbrella term for various phenolic compounds that naturally occur in olives and Extra Virgin Olive Oil.

These include or arise from, among others:

• Hydroxytyrosol and corresponding derivatives
• Tyrosol and corresponding derivatives
• Oleocanthal
• Oleacein
• Oleuropein-related compounds
• Ligstroside-related compounds
• other phenolic substances

Phenolic compounds are of interest, among other things, for:

• Bitterness
• Pungency
• Sensory profile
• Oxidative stability

How high a measured value turns out to be depends, for example, on:

• Olive variety
• Degree of ripeness
• Time of harvest
• Location
• Climate
• Harvest year
• Processing
• Storage
• Analytical method
• Time of analysis

A high total polyphenol value can therefore be a very strong analytical product feature.

But it is:

not a complete quality assessment.

Total polyphenols | Why the number alone is not enough

An olive oil with:

2081 mg of total phenols per kg

possesses an extraordinarily high current analytical value.

But even this number does not automatically answer:

• how the oil tastes
• how balanced it is
• which specific phenolic compounds are contained
• which method was used
• how fresh the examined sample was
• whether the specific product fulfills the conditions of a specific EU Health Claim

Therefore, total polyphenol values should always be read in their analytical context.

Polyphenols in olive oil | Taste, analytical values, and EU Health Claim

3. How long does olive oil keep?

Olive oil generally does not get better with long-term storage.

This distinguishes it, for example, from certain wines.

Fruitiness and various sensitive components can change over time.

Nevertheless, there is no serious universal rule such as:

After exactly twelve months, every olive oil is bad.

Or:

After being opened for exactly three months, every bottle must be disposed of.

Stability depends, among other things, on:

• Initial quality
• Olive variety
• Fatty acid profile
• Phenol profile
• Packaging
• Light
• Temperature
• Oxygen exposure
• Storage duration

A particularly stable, well-protected olive oil may develop differently than a more sensitive oil in unfavorable packaging.

Best-before date and harvest year | Two different pieces of information

The:

best-before date

is not the same as:

the harvest year.

The harvest year helps in temporally classifying the actual olive harvest.

The best-before date, on the other hand, describes the period during which the product is expected to maintain its specific characteristics under proper storage conditions.

A best-before date far in the future does not automatically prove an especially fresh harvest.

Anyone buying premium olive oil should therefore understand both levels if possible.

How long after opening?

Opening it begins greater contact with:

Oxygen.

The more olive oil is removed from a bottle or container, the larger the air space in the container normally becomes.

Therefore, selecting the appropriate container size is important.

Anyone using only very little olive oil does not automatically need a:

5-liter container.

Conversely, those who cook regularly and use up a large container within a reasonable timeframe can make good use of 3 or 5 liters.

The better question is therefore not: Which container size is fundamentally the best?

But rather:

How quickly will I use it after opening?

4. How do I store olive oil correctly?

The most important factors that can influence olive oil after production are:

• Light
• Unnecessarily high temperatures
• Oxygen
• Time

In a normal household, the following is often suitable:

a dark and rather cool pantry.

Unfavorable places are, for example, permanent locations:

• directly next to the stove
• directly next to the oven
• above a heater
• on a sunny windowsill

After every use, the container should be:

closed tightly again.

Dark glass, suitable metal containers, and other light-protecting packaging can be useful.

Packaging protects existing quality.

It does not create quality that was not present before.

Storing olive oil correctly | Protecting polyphenols, taste, and freshness

Does olive oil need to go in the refrigerator?

Usually not.

A suitable dark and cool pantry is sufficient in many cases for household use.

At low temperatures, olive oil can:

• become cloudy
• form crystals
• partially solidify

This does not automatically mean:

The olive oil is spoiled.

At higher temperatures, it can become liquid and clearer again.

The so-called "refrigerator test" is therefore not a reliable authenticity test for olive oil.

5. Can I use Extra Virgin Olive Oil for frying?

Yes.

Extra Virgin Olive Oil can be used for numerous applications in warm cooking.

These include, for example:

• Searing
• Braising
• Baking
• Oven-roasted vegetables
• Pan-cooked dishes
• and even deep-frying under suitable conditions

Olive oil typically possesses a high proportion of:

monounsaturated oleic acid.

Additionally, natural accompanying substances such as phenolic compounds can contribute to oxidative stability.

Studies under frying conditions show that olive oil, and especially Extra Virgin Olive Oil, can possess:

good thermal and oxidative stability.

The claim that Extra Virgin Olive Oil should fundamentally not be heated is therefore incorrect.

What happens to polyphenols when heated?

Just because olive oil can be heated does not mean:

Heat changes nothing at all.

With prolonged, intense, or repeated heating, among other things:

• individual phenolic compounds can decrease
• oxidation products can increase
• aromas can be lost
• further chemical changes can occur

Current research on repeated frying confirms that phenolic compounds can decrease significantly during thermal stress.

This does not contradict the oil's good heat stability.

It merely means:

"heat-stable" is not the same as "completely unchangeable."

For the household, therefore:

Olive oil may be heated. Unnecessary overheating and strong smoking should be avoided.

Olive oil or sunflower oil | Scientific comparison

Is the smoke point the only decisive number?

No.

The smoke point is an interesting practical property.

However, it is not the only criterion for evaluating a cooking oil when heated.

The following are also relevant for thermal stability:

• Fatty acid composition
• Antioxidants
• Phenols
• Temperature
• Duration
• Oxygen exposure
• Frequency of reuse

The question of whether a cooking oil is suitable for frying should therefore not be reduced to a single smoke point.

6. Is green olive oil better than golden-yellow olive oil?

No.

The color of an olive oil is influenced by, among other things:

• Olive variety
• Degree of ripeness
• Chlorophyll
• Carotenoids
• Processing
• Filtration
• Storage

Early harvested olives can often produce an intensely green olive oil.

But:

A golden-yellow extra virgin olive oil can be just as excellent.

The color does not reliably indicate:

• how high the total polyphenols are
• how low the acidity is
• whether the oil is sensorially flawless
• how fresh it is
• how high-quality the fruit was

Color is therefore not a reliable quality index.

Why professional tasters should not overestimate color

In professional sensory evaluation, color should not influence the judgment of smell and taste.

For this reason, colored tasting glasses are traditionally used for professional olive oil tastings.

This allows the taster to focus more on:

• Fruitiness
• Bitterness
• Pungency
• Sensory defects

This clearly shows how meaningless the simple rule "green means better" is.

7. How much olive oil should you eat per day?

A statement like:

Every person should eat exactly 20, 30, or 40 g of olive oil every day

is too generalized.

The appropriate amount depends on, among other things:

• Overall diet
• Energy requirements
• Other sources of fat
• Body size
• Activity levels
• Individual nutritional goals

Olive oil is also energy-dense.

One gram of fat provides approximately:

9 kilocalories.

The amount used should therefore fit into your overall diet.

Why are 20 g constantly mentioned anyway?

The frequently mentioned:

20 g of olive oil

has a concrete European legal basis.

For suitable olive oils, the following health claim is authorized:

"Olive oil polyphenols contribute to the protection of blood lipids from oxidative stress."

This claim may only be used for an olive oil that contains at least:

5 mg of hydroxytyrosol and its derivatives, for example, oleuropein complex and tyrosol, per 20 g of olive oil.

In addition, consumers must be informed that the positive effect is achieved with a daily intake of:

20 g of olive oil.

This is an expressly permitted positive EU Health Claim, provided that the specific product meets the legal requirements.

20 g is not a general drinking cure

The condition of the EU health claim does not mean that:

Everyone must drink 20 g of pure olive oil in the morning.

The 20 g can, of course, be consumed as part of normal meals.

For example:

• in salad
• over vegetables
• with legumes
• with fish
• over finished dishes

The number is a condition of this specific claim and not a universal medical dosage.

How much olive oil per day | Research and EU health claim

Total polyphenols and EU health claim | Please do not equate them

The condition:

5 mg per 20 g

is mathematically equivalent to:

250 mg per kg.

But the following rule should not be derived from this:

250 mg of total polyphenols per kg automatically fulfills the EU health claim.

The claim refers specifically to:

Hydroxytyrosol and its derivatives.

A general total polyphenol value may represent a different sum of compounds.

Therefore, for claim verification, the relevant compounds, the method used, and the specific analyzed sample count.

8. Can you taste a difference between inexpensive and premium olive oil?

There can be very clear sensory differences between different olive oils.

But:

Price alone does not explain these differences.

A cheaper extra virgin olive oil is not automatically:

• rancid
• adulterated
• refined
• inferior

Conversely, a high price does not prove top quality.

Premium olive oils, however, may have higher production costs.

For example, due to:

• lower yield from early harvest
• special olive varieties
• small production quantities
• labor-intensive harvesting
• rapid processing
• laboratory analyses
• certifications
• high-quality packaging
• limited production runs

These factors can explain a higher price.

However, the retail price itself is:

not a chemical or sensory quality parameter.

What can you actually distinguish when tasting?

A high-quality extra virgin olive oil can have very different characteristics depending on the variety and style.

For example:

• green fruitiness
• riper fruitiness
• grass
• tomato leaf
• artichoke
• green almond
• herbs
• bitterness
• peppery pungency
• long aftertaste

Premium quality does not mean that all high-quality olive oils taste the same.

It is precisely the different olive varieties that make the comparison interesting.

9. Is organic olive oil automatically better?

No.

Organic certification and sensory or analytical top quality answer different questions.

An organic certification describes requirements for:

• ecological production
• processing
• inspection
• labeling

It does not automatically mean:

• more polyphenols
• lower acidity
• earlier harvest
• stronger pungency
• better sensory profile
• higher overall quality than every conventional olive oil

An organic olive oil can be exceptional.

A conventional extra virgin olive oil can also be exceptional.

Organic and premium can coexist.

But they are not the same thing.

What does DE ÖKO 007 mean at Green Agora?

Green Agora is subject to:

Organic inspection DE ÖKO 007.

This does not mean:

Every olive oil in the entire assortment is automatically certified organic.

Whether a specific product is organic must be clear from its actual labeling and certification.

Likewise, from the word:

Organic

the statement:

pesticide-free

should not be automatically derived.

Such a concrete statement requires an appropriate product-specific basis.

10. Which olive oil is the best?

There is no single best olive oil for every person.

The more sensible question is:

Which high-quality olive oil suits my taste and my use?

One person is looking for:

maximum intensity.

Another for:

a harmonious everyday oil.

Someone wants to:

get to know a specific olive variety.

Another is looking for:

a large container for daily cooking.

That is why we do not just give advice based on a single ranking list.

Pamako Gold Organic | For exceptionally high current analysis values

Pamako Gold Organic is produced from:

Tsounati olives

from Crete.

The currently published total polyphenol value is:

2081 mg/kg.

This is analytically exceptional.

Pamako Gold also has an intense sensory profile with clear bitterness and pungency.

For people who want to get to know a characterful Tsounati, this product is particularly interesting.

Discover Pamako Gold Organic

Pamako Blend Silver Organic | For Tsounati and Koroneiki in the blend

Pamako Blend Silver Organic combines:

• Tsounati
• Koroneiki

from Crete.

The currently published total polyphenol value is:

1466 mg/kg.

The combination of two olive varieties leads to a different sensory profile than the single-varietal Pamako Gold.

That is precisely why I find the direct comparison between Gold and Silver more exciting than a pure numerical comparison.

Discover Pamako Blend Silver Organic

Kouros of Zeus Red | For Kalamon from early harvest

Kouros of Zeus Red is produced from:

Kalamon olives

from Krokes in the Peloponnese.

The currently published total polyphenol value is:

835 mg/kg.

The current oleocanthal value is:

649 mg/kg.

This makes the product analytically interesting.

But for me, at least as exciting is:

the Kalamon olive itself.

Many people know Kalamon primarily as a table olive.

As an olive oil, the variety shows an independent character.

Discover Kouros of Zeus Red

Mitira Organic | For a more harmonious profile from Lesbos

Mitira Organic combines:

• Kolovi
• Adramitiani

from the island of Lesbos.

The currently published total polyphenol value is:

426 mg/kg.

Mitira has a more harmonious profile than some particularly intense early harvests.

That is precisely why it can be interesting for people who want to get to know premium olive oil without starting with maximum bitterness and pungency.

Discover Mitira Organic

Creta Eleon Organic | For higher consumption in daily cooking

Those who regularly use larger amounts of olive oil can make good use of a larger container.

Creta Eleon Organic is produced from:

Koroneiki olives from Crete.

The product is offered in, among others:

• 3-liter containers
• 5-liter containers

Such sizes can be interesting for households that regularly use olive oil for:

• salads
• vegetables
• fish
• legumes
• hot cooking

The decisive factor is that the large container is actually consumed in a reasonable amount of time.

Discover Creta Eleon Organic 3 Liters

Discover Creta Eleon Organic 5 Liters

Additional question | Why does good olive oil sometimes burn in the throat?

The peppery pungency of an extra virgin olive oil is a:

recognized positive sensory property.

Certain phenolic compounds contribute to this sensation.

Particularly well-known is:

Oleocanthal.

Oleocanthal is associated with the characteristic peppery sensation that can occur especially in the throat.

A clearly pungent olive oil can therefore be excellent.

But:

"The stronger it scratches, the better it is" is not a reliable quality rule.

A harmonious or milder extra virgin olive oil can also have excellent quality.

Pungency is not a polyphenol meter

From the intensity in the throat, one cannot precisely read:

• how high the total polyphenols are
• how much oleocanthal is contained
• how high the claim-relevant hydroxytyrosol derivatives are
• what acidity level the oil has
• if it is better overall

Sensory evaluation can give indications of character.

Only analysis provides exact chemical numbers.

Additional question | Is early harvest always better?

No.

Early harvest can produce exceptional olive oils.

With many varieties, it can be associated with:

• lower oil yield
• interesting or high concentrations of certain phenols
• green fruitiness
• distinct bitterness
• pronounced pungency

But:

Early harvest is not a legal quality grade.

And:

Earlier does not automatically mean more polyphenols for every olive variety.

What remains relevant are:

• olive variety
• location
• degree of ripeness
• harvest year
• fruit health
• processing
• sensory profile

Early harvest is therefore a production decision and not a universal ranking list.

Early harvest olive oil | Understanding "early harvest" correctly

The ten answers as a short checklist

1. Quality: Extra virgin olive oil is the most important legal starting category. Other factors count for premium quality.
2. Polyphenols: High values can be analytically exceptional. They are not the sole quality index.
3. Shelf life: Freshness is important. Rigid universal expiration dates after opening are too simple.
4. Storage: Protect from light and unnecessary heat and seal well.
5. Frying: Yes. Extra virgin olive oil can be used for numerous warm culinary applications.
6. Color: Green is not automatically better than golden-yellow.
7. Daily amount: There is no universal medical dosage. The 20 g belongs to a specific EU health claim.
8. Price: Higher production costs can explain a price. Price alone does not prove quality.
9. Organic: Organic is an important production characteristic, but not an automatic sensory or analytical quality ranking.
10. Best olive oil: Quality, taste, and the desired use are the deciding factors.

Comparing premium olive oil in person

Many questions can be answered online.

Taste is best experienced for yourself.

In our:

Green Agora Olive Oil Showroom in Lüdenscheid

visitors can compare different:

• producers
• regions
• olive varieties
• early harvests
• blends
• sensory profiles

with one another.

The showroom, professionally designed by an interior designer, covers approximately:

360 square meters

with a ceiling height of about:

4 meters.

There, for example, the differences between:

• Tsounati
• Koroneiki
• Kalamon
• Hondroelia
• Amfissis
• Kolovi
• Adramitiani

can be directly experienced.

A laboratory figure explains an olive oil. A tasting shows additionally how it actually tastes.

Get to know the Green Agora Olive Oil Showroom and tasting

Ayhan's perspective | Don't buy based on a single number

Many questions about olive oil ultimately come down to the same thing.

People are looking for a simple rule.

For example:

the highest polyphenol value.

the lowest acidity.

the earliest harvest.

the strongest pungency.

This information can be very interesting.

I don't want to downplay strong values either.

When a Pamako Gold currently shows:

2081 mg of total phenols per kg

that is extraordinary.

If another olive oil has a remarkably low acidity value, that is also a strong analytical property.

But I would never select an olive oil based on a single number alone.

I am interested in the:

• olive variety
• origin
• producer
• harvest
• processing
• sensory profile
• current analysis
• and the desired use

Above all, I want to know:

What is the customer looking for?

A person who loves intense bitterness and pungency needs a different recommendation than someone looking for a harmonious family oil for daily cooking.

The best advice therefore does not start with the highest number, but with the right question.

Ayhan from Green Agora

Scientific and legal basis

• Delegated Regulation (EU) 2022/2104 | Quality characteristics and marketing standards for olive oil
• Regulation (EU) 432/2012 | Authorized health claims for olive oil polyphenols
• Virgin Olive Oil as Frying Oil | Scientific review on the use of olive oil for frying
• Olive Oil Stability Under Deep Frying Conditions | Investigation into the stability of various olive oil categories
• Bioactive Compounds in Spanish Extra Virgin Olive Oils | Changes during various cooking techniques | 2023
• Deep Frying in Extra Virgin Olive Oil | Degradation of phenolic compounds during repeated frying | 2026

The most important basic rule of this guide is:

A single number can describe a real and strong product characteristic.

The overall quality of an olive oil nevertheless arises from the interplay of several factors.

Further Green Agora guides

• How can you recognize good olive oil?
• Extra virgin olive oil | What does the quality grade mean?
• Polyphenols in olive oil | Taste, analytical values, and EU health claim
• Early harvest olive oil | Understanding "early harvest" correctly
• Storing olive oil correctly | Protecting polyphenols, taste, and freshness
• Olive oil or sunflower oil | A scientific comparison
• Premium olive oil | How to recognize exceptional quality

Discover premium olive oil at Green Agora

Green Agora curates premium olive oils from various:

• producers
• regions
• olive varieties
• harvests
• sensory profiles
• analytical profiles

We want to make differences visible rather than reducing everything to a single quality score.

Discover premium olive oils

Would you like a personal recommendation?

We provide consultation throughout Germany via phone and WhatsApp, or in person at the Green Agora Olive Oil Showroom in Lüdenscheid.

WhatsApp: +49 175 9009341

Email: info@greenagora.de

Instagram: @greenagora.de

Facebook: Green Agora on Facebook