What Are Polyphenols? The Science Behind Premium Olive Oil
The term "extra virgin" tells you about the extraction process. It says almost nothing about nutritional value.
Polyphenols do.
What are polyphenols?
Polyphenols are naturally occurring antioxidant compounds found in olives. They're responsible for:
- The peppery, slightly bitter finish of high-quality olive oil
- Anti-inflammatory properties linked to cardiovascular health
- The oil's resistance to oxidation (shelf stability)
The EU has approved a health claim: olive oils with ≥250 mg/kg of polyphenols can state they contribute to the protection of blood lipids from oxidative stress.
Why do levels vary so much?
| Factor | Effect on Polyphenols |
|---|---|
| Early harvest | Higher — unripe olives contain more |
| Late harvest | Lower — polyphenols convert to sugars |
| Heat during pressing | Destroys polyphenols |
| Time since harvest | Degrades over months |
| Storage conditions | Light/heat accelerate loss |
A supermarket EVOO might have 50–80 mg/kg. A properly harvested, cold-pressed early harvest oil can reach 400–600 mg/kg.
The label problem
Polyphenol content is not required on labels in most markets. You're expected to trust the "extra virgin" designation — which only measures acidity and sensory defects, not nutritional density.
Ask your olive oil producer for their lab results. If they don't have them, that's your answer.
Bilgilendirme Notu
Bu içerik yalnızca bilgilendirme amaçlıdır. Sağlık, beslenme veya tıbbi konulardaki bilgiler genel nitelikte olup profesyonel tıbbi tavsiye yerine geçmez. Ürün özellikleri, hasat dönemi ve analiz sonuçları parti bazında farklılık gösterebilir.