EVOO Observatory

Maionese fatta in casa con olio extravergine, uova, limone e frusta
Extra virgin olive oil mayonnaise: bitterness, technique and egg safety
How to make mayonnaise with extra virgin olive oil: manage bitterness and emulsion, use pasteurized eggs, refrigerate safely and avoid common mistakes. Read more...
Oliera in vetro pulita con uno scovolino e lasciata asciugare
How to clean an olive oil cruet without lingering odours: a practical method
How to clean a glass or steel olive oil cruet: detergent, thorough rinsing and complete drying, plus mistakes to avoid. Read more...
Bottiglia di olio extravergine protetta in una valigia pronta per il volo
Can You Take EVOO on a Plane? Cabin and Checked Baggage Rules
Can you take EVOO on a plane? Current rules for cabin bags, checked luggage, duty-free purchases, packing and customs checks. Read more...
Cucchiaio con olio extravergine accanto a una bilancia da cucina
How Many Calories Are in a Tablespoon of EVOO? Portions and Conversions
How many calories are in a tablespoon of EVOO? A practical table for teaspoons, tablespoons, grams and millilitres, with clear conversions. Read more...
Bottiglia di olio EVO, aglio, rosmarino e peperoncino separati davanti a un frigorifero
Homemade infused olive oil: garlic, herbs and botulism risk
Garlic- or herb-infused EVOO: why it needs refrigeration, the four-day rule, when to freeze it and which mistakes increase botulism risk. Read more...
Olio extravergine e olive in primo piano con alimenti di origine animale sullo sfondo
Does extra virgin olive oil contain cholesterol? What the label really says
Does EVOO contain cholesterol? No. Learn the difference between dietary and blood cholesterol, what the EU label shows and which claims are allowed. Read more...
Olio extravergine, burro, impasto e plumcake su un piano da cucina
How to replace butter with EVOO in baking: amounts and conversion table
How much EVOO replaces butter in baking? A 75% conversion table, suitable recipes and the cases where a direct swap does not work. Read more...
Bottiglia di olio di oliva etichettata con dispositivo antirabbocco su un tavolo da ristorante
Olive oil in Italian restaurants: is a non-refillable bottle mandatory?
Must EVOO in an Italian restaurant have a non-refillable closure? What Italian law requires, how to check the bottle and label, and where the rule stops. Read more...
Campioni di olio di oliva, olive e sansa preparati per l’analisi delle cere in laboratorio
Waxes in EVOO: what they indicate and why they are measured
What do waxes indicate in extra virgin olive oil? The EU limit, C42, C44 and C46, laboratory testing and why there is no home test. Read more...
Olio da cucina usato raffreddato e filtrato in una bottiglia chiudibile per la raccolta differenziata
Where Should Used Cooking Oil Go? A Practical Disposal Guide
Where should used cooking oil go? Learn how to collect it, what never to mix with it and how to use the correct local recycling service. Read more...
Cassette di olive su una bilancia e olio misurato in frantoio per calcolare la resa
How Much Oil From 100 kg of Olives? Yield Explained
How many litres of olive oil come from 100 kg of olives? Formula, yield examples and why a high percentage does not mean better quality. Read more...
Pasta di olive e noccioli separati durante la lavorazione in frantoio
EVOO from destoned olives: is it really better?
Destoned olive oil: what really changes in phenols, aroma and yield, and why removing the stone does not by itself guarantee better EVOO. Read more...
Analisi spettrofotometrica UV di un campione di olio per la determinazione degli indici K232 e K270
K232 and K270 in extra virgin olive oil: what these values really mean
K232 and K270: what they measure in extra virgin olive oil, EU limits, and why proper laboratory analysis is required. Read more...
Gascromatografo in laboratorio per analisi chimiche dell’olio; foto NeoLyo89, Wikimedia Commons, CC BY 4.0
Ethyl esters in EVOO: what they really reveal about quality
Fatty acid ethyl esters (FAEEs) are an analytical EVOO parameter linked mainly to olive quality and fermentation. Learn what they measure, the EU limit and what consumers can actually assess. Read more...
Attrezzatura di laboratorio per titolazione, utilizzata come contesto illustrativo per l’analisi chimica dell’olio EVO. Foto: Goodymeraj, CC0, Wikimedia Commons.
Peroxide value in EVOO: what it really measures and why it matters
Peroxide value measures an early stage of oil oxidation. Learn what it indicates, the EU limit for extra virgin olive oil and why it cannot be read alone. Read more...
Fori di uscita della mosca dell’olivo Bactrocera oleae su olive; foto Giancarlo Dessì / Istituto Cettolini, Wikimedia Commons
Olive fruit fly: can it really reduce extra virgin olive oil quality?
Olive fruit fly can damage olives and affect acidity, oxidation, phenols and sensory quality. Here is what research shows and what consumers can actually verify. Read more...
Lavaggio e pulizia delle olive su una linea in acciaio prima della molitura in frantoio
Should olives be washed before milling? What really happens at the mill
Is washing olives before milling always better? When washing is useful, when it may be unnecessary, and what it can change in EVOO. Read more...
Decanter centrifugo per l'estrazione dell'olio d'oliva in frantoio; foto di Giancarlo Dessì, CC BY-SA 3.0
Two-phase or three-phase decanter: does it really change EVOO quality?
Two phases, three phases and added water: what really changes in EVOO extraction, phenols, yield and by-products. Read more...
Pasta di olive durante la gramolatura — foto Iworkwithyou, Wikimedia Commons, CC BY-SA 3.0
Olive oil malaxation: what it is and why time and temperature really matter
What is olive oil malaxation? Learn how time, temperature and oxygen can influence extraction yield, aromas and phenolic compounds—and what consumers can actually verify. Read more...
Bottiglia d’olio parzialmente piena, esempio dello spazio d’aria che aumenta durante il consumo
Opened EVOO: does the air in the bottle ruin it? What really happens
A half-empty EVOO bottle contains more air: learn why oxygen promotes oxidation, what you can do at home and what requires professional analysis. Read more...
Olive appena raccolte con cassette e attrezzi per la raccolta manuale e meccanizzata in un uliveto
Hand-picked or machine-harvested olives: does it really change EVOO quality?
Hand or machine harvesting: what really changes for EVOO? Evidence, limits of the “hand-picked” claim and practical criteria for buyers. Read more...
Cassette di olive appena raccolte vicino al frantoio prima della molitura
Olives milled within 24 hours: does it really guarantee EVOO quality?
Does milling olives within 24 hours guarantee quality? What research says about timing, olive storage and extra virgin olive oil quality. Read more...
Olio extravergine con olive di diverse cultivar, tema monovarietale e blend
Monovarietal olive oil or blend: which is better and what really changes?
Monovarietal or blend? Learn what really changes between cultivars, sensory profile and EVOO composition, and why neither is automatically better. Read more...
Olio extravergine di oliva con olive e foglie in un uliveto, immagine editoriale sui polifenoli dell’EVO
Polyphenols in extra virgin olive oil: what they are and when the EU health claim is allowed
What olive oil polyphenols are, why bitterness and pungency cannot quantify them, and when EU rules allow the health claim on protecting blood lipids. Read more...
Olive verdi e mature accanto a olio extravergine, per spiegare come il grado di maturazione influenza il profilo dell’olio
Oil from green or ripe olives: what really changes in taste and quality?
Early harvest or riper olives? Learn how olive ripeness can affect yield, sensory profile, phenolic compounds and EVOO stability. Read more...
Bottiglia di olio extravergine di oliva con olive e oliveto sullo sfondo
Organic extra virgin olive oil: what “organic” really means — and what it does not guarantee
What does organic certification really guarantee for extra virgin olive oil? Learn how to read the EU organic logo, control-body code and origin without confusing “organic” with absolute quality. Read more...
Olio di oliva e olive in un uliveto mediterraneo, immagine editoriale sulle categorie dell’olio
Extra virgin, virgin or “olive oil”? The real differences between olive oil categories
Extra virgin, virgin, olive oil and olive-pomace oil are not synonyms. Learn how production, requirements and label wording differ under EU rules. Read more...
Bottiglia di olio d’oliva in vetro, esempio di confezione per la conservazione dell’olio EVO
Dark glass, tin or bag-in-box? Which packaging protects extra virgin olive oil best?
Light and oxygen accelerate EVOO deterioration. Here is how dark glass, tins, PET and bag-in-box differ and what to look for when choosing olive oil packaging. Read more...
Olio extravergine di oliva versato a tavola, immagine editoriale per la guida a DOP e IGP
PDO and PGI extra virgin olive oil: what they really guarantee and how to check the label
PDO and PGI are more than label claims: they protect registered geographical names tied to a product specification. Learn what they mean for EVOO and how to verify a name... Read more...
Olio extravergine di oliva versato in una ciotola accanto a olive fresche, immagine editoriale sul tema dell’acidità
Extra virgin olive oil acidity: what 0.8% really means and why you cannot taste it
What does extra virgin olive oil acidity mean? The 0.8% figure is a chemical limit, not a taste. Learn how it is measured, what it indicates and why a low... Read more...
Estrattore centrifugo decanter utilizzato nella moderna estrazione dell’olio di oliva
First cold pressing or cold extraction? What these EVOO terms really mean
First cold pressing and cold extraction are not synonyms: EU rules reserve them for different processes below 27 °C. Here is how to read these EVOO label terms correctly. Read more...
Bottiglia di olio extravergine di oliva in frigorifero durante il test del freddo
Extra virgin olive oil in the fridge: does the cold test really prove authenticity?
Putting extra virgin olive oil in the fridge cannot prove whether it is authentic. Here is why the cold test is unreliable and which checks actually verify EVOO. Read more...
Donna durante la degustazione sensoriale dell’olio extravergine di oliva da un bicchiere blu
Why does extra virgin olive oil catch in your throat? Bitterness and pungency explained
Why does extra virgin olive oil feel peppery in the throat or taste bitter? Learn what pungency and bitterness mean in EVOO and why neither alone proves quality. Read more...
Olio extravergine filtrato e non filtrato a confronto, con una bottiglia limpida e una torbida
Filtered or unfiltered extra virgin olive oil: which should you choose and why is new oil cloudy?
Filtered or unfiltered extra virgin olive oil? Learn why new oil can look cloudy, what filtration actually removes and what matters for quality and storage. Read more...
Lente di ingrandimento sulla data da consumarsi preferibilmente entro di una bottiglia di olio extravergine di oliva
Does extra virgin olive oil expire? How to read the best-before date
Does extra virgin olive oil expire? Learn what the best-before date means, how it differs from harvest year and what to check before using older olive oil. Read more...
Bicchieri blu da assaggio per la valutazione sensoriale dell’olio extravergine di oliva
How to taste extra virgin olive oil: a practical guide to the panel test
How to taste extra virgin olive oil at home using panel-test principles: fruitiness, bitterness, pungency, defects and why colour is not a quality test. Read more...
Bottiglie di olio di oliva conservate su uno scaffale al riparo dalla luce diretta
How to store extra virgin olive oil: light, heat and air are the real enemies
How should extra virgin olive oil be stored after opening? A practical guide to light, heat, oxygen, containers and refrigeration. Read more...
Etichetta di una bottiglia di olio extravergine di oliva italiano in primo piano
Extra virgin olive oil label: how to read it and what EU law requires
How to read an extra virgin olive oil label: category, origin, best-before date, storage and optional claims. A practical guide based on EU rules. Read more...
Olio extravergine di oliva versato in padella per la cottura e la frittura
Can you fry with extra virgin olive oil? What the science really says
Can you fry with extra virgin olive oil? Yes. Learn about frying temperatures, smoke point, heat stability and how to cook correctly with EVOO. Read more...
Olio extravergine di oliva su pane tostato: guida a prezzo e qualità EVO
Extra virgin olive oil at €7.99: can it really be EVOO?
Cheap extra virgin olive oil: a low price does not prove fraud. Learn what EVOO means and how to assess the label, origin, quality and packaging. Read more...