What are the High Polyphenols Olive Oils?
These oils belong to a rare, premium quality of olive oils. They are also known as High Phenolic Olive Oils. Our olive oils meet the conditions of use for the Authorised olive oil polyphenol Health Claim (EFSA 432/2012).
Authorised UK and EU health claim
Olive oil polyphenols contribute to the protection of blood lipids from oxidative stress.
The beneficial effect is obtained with a daily intake of 20 g of olive oil, as part of a varied, balanced diet and a healthy lifestyle.
Published research on Olive Oil polyphenols
Cardiovascular Research
Brain & Cognition Research
Glucose Metabolism Research
Joints & Connective Tissue Research
Oxidative Stress Research
Gut Microbiome Research
Inflammatory Response Research
A message from our family...
At MasWorth, we believe that what we eat forms the foundation of our health and well-being.
Our mission is to deliver unique, premium-quality products that combine exceptional flavor with natural elements that are well known for their health benefits. We are honored to share our High Polyphenols Olive Oils with those who value both health and proper nutrition.
Our limited-production, ultra-premium Extra Virgin Olive Oils – November Polyphenols and MasWorth – have earned international acclaim for their outstanding quality and certified richness in polyphenols, that meet the conditions of use for the Authorised Olive Oil Polyphenol Health Claim.
Thank you for choosing our products. Your trust drives our passion for quality, always aiming to offer you the Best Olive Oils and we look forward to sharing more of our journey with you.
Only trust High Polyphenols Olive Oils with Lab Analysis Certificates.
The Lab Certificates of our oils NOVEMBER POLYPHENOLS and MASWORTH EVOO can be found below
High Polyphenol Olive Oil
Independently Certified for its High Polyphenol levels: +1200 mg/kg;. Don't just take our word for it...Our oils quality and polyphenols analysis are not just marketing claims, they are supported by independent certificates provided by specialised, highly respected laboratories.
100% Certified Organic:
No chemicals. No shortcuts. Just pure, sun-grown olives from Greek organic farms — as nature intended. Certified by BIOHELLAS and SOIL Association inspected/licensed in the UK
Award-Winning Quality
Expert-approved excellence - Gold Medals for Best Organic Quality
Early Fresh Harvest Oct/Nov 2025:
First Press, Cold Extracted, Fresh taste, maximum nutrients. This oil's olives are picked early, while they’re still green, when their natural polyphenol content is at its highest. Green olives give much less oil than ripe ones, so each bottle takes more fruit and costs more to produce. That’s the trade-off we choose: less oil, but far richer in polyphenols, with the grassy flavour and unique characteristics of a true early-harvest olive oil.
Fully Transparent Sustainable Farming
Produced in Greek Family groves. Fully transparent and Certified harvest from Cultivation to Distribution. Many olive oils show only a best-before date, which says nothing about when the olives were picked and can be set up to two years after bottling. We print the harvest period on every bottle, so you always know how fresh your oil is.
Naturally Filtered
Light filtration ensures food safety while also reduces oxidation, extending shelf life and offered health benefits.
OLIVE OIL
NOVEMBER 500ml
November Polyphenols Early Harvest Organic Extra Virgin Olive Oil (500ml)
£27.90
£25.90
VIEW PRODUCTOLIVE OIL
NOVEMBER 500ml
10% OFF with 3 or more of November Polyphenols Early Harvest Organic EVOO (500ml)
£27.90
£23.31
VIEW PRODUCT
Complete Transparency, Lab-Certified
We believe in proof, not promises. Every harvest is independently lab-tested and certified by specialised labs, ensuring full transparency and verified quality.
Documented Polyphenol Levels: Over 1200 mg/kg of polyphenols reported for NOVEMBER POLYPHENOLS olive oil of Oct/Nov 2025 Harvest — measured and certified.
Click here to view Certificate.
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High Polyphenol Olive Oil (+960 mg/kg):
A rare type of premium olive oil. Independently Certified for its valuable olive oil polyphenols.
100% pure Extra Virgin Olive Oil:
From the sunlit groves of Greece — Limited small Family Groves production.
Award-Winning Quality
Expert-approved excellence for Best EVOO Quality
Early Harvest, First Press, Cold Extracted:
Always from the most recent available Harvest (Latest harvest: November 2025). Fresh taste, maximum nutrients
Transparent from Grove to the Customer
Certified harvest from Cultivation to final Distribution to the client
Naturally Filtered
Light filtration ensures food safety while also reduces oxidation, extending shelf life and offered health benefits.
OLIVE OIL
MasWorth 750ml
MasWorth Family Groves Extra Virgin Olive Oil - Fresh Harvest (750ml)
£26.90
£24.90
VIEW PRODUCTOLIVE OIL
MasWorth 750ml
10% OFF with 3 or more MasWorth Family Groves 100% Extra Virgin Olive Oil - Fresh Harvest (750ml)
£24.90
£22.41
VIEW PRODUCT
Complete Transparency,Lab-Certified
We believe in proof, not promises. Every harvest is independently lab-tested and certified by specialised labs, ensuring full transparency and verified quality.
Documented Polyphenol Levels: Over 960 mg/kg of polyphenols reported for MasWorth olive oil of November 2025 harvest — measured and certified.
Click here to view Certificate.
Real love, from people,
who've seen a real difference.
‘Health & Polyphenols’
“What impressed me most about this olive oil is the transparency and the very high polyphenol levels. The fact that it is lab-certified and that you can verify the analysis gives great confidence. It’s rare to find an olive oil that combines exceptional taste with scientifically recognized health benefits. I will definitely continue buying it.”
‘Authenticity & Family Production’
“You can tell this is a product made with care. Knowing it comes from a family-owned olive grove withgenerations of experience makes a big difference. The oil tastes vibrant and fresh, and the quality is clearlysuperior to supermarket olive oils. It feels like a truly authentic Mediterranean product.”
‘Customer Experience & Service’
“Excellent product and excellent service. The olive oil arrived quickly and was very well packaged. Theteam was also extremely helpful in explaining the characteristics of high-polyphenol olive oil and how tobest enjoy it. It’s refreshing to buy from a company that cares about both quality and customer experience.”
‘Health & Polyphenols’
“What impressed me most about this olive oil is the transparency and the very high polyphenol levels. The fact that it is lab-certified and that you can verify the analysis gives great confidence. It’s rare to find an olive oil that combines exceptional taste with scientifically recognized health benefits. I will definitely continue buying it.”
Our Award Winning Oils
Published research on Olive Oil polyphenols
Explore peer-reviewed research
investigating olive oil polyphenols across a range of biological and
health-related topics. These research topics are provided for scientific
information only (not authorised UK or EU health claims)
Frequently asked questions
What is a High Polyphenol Olive Oil (or High Phenolic Olive Oil)?
A High Polyphenol Olive Oil is an extra virgin olive oil that contains unusually high levels of naturally occurring antioxidants called polyphenols. These compounds are linked to protection of blood lipids from oxidative stress (EU Health Claim 432/2012). Because November Olive Oil independent lab analysis showed that this oil far exceeded the minimum EU threshold for the official health claim olive oil classification.
Filtered or Unfiltered Olive Oil?
November Olive Oils and MasWorth Olive Oils are filtered. The filtering process helps olive oil to maintain stability and preserve their healthy qualities and polyphenols. Unfiltered olive oils include olive particles that will continue to ferment in the bottle and the sediment on the bottom of the bottle will accelerate the oxidation, thus negatively affecting the quality of the olive oil.
What makes November Polyphenols Olive Oil so unique?
November Polyphenols Olive Oil belongs to a rare category of High Polyphenol Olive Oils (also called High Phenolic Olive Oils, or Health Claim Olive Oils). What makes it truly unique is its lab-certified polyphenol content of +1200 mg/kg in the October–November 2025 harvest, its 100% organic certified cultivation and traditional farming processes. November olive oil is placed among the highest olive oil quality in the world, delivering exceptional polyphenol levels alongside a vibrant, peppery taste.
What are the health benefits of High Polyphenols olive oil like November Polyphenols Olive Oil?
Thanks to its extraordinary polyphenol content (above 1200 mg/kg), this oil is rich in Polyphenols (natural antioxidants) that support protection of blood lipids from oxidative stress (as recognised by the official EU Health Claim 432/2012) Enjoying just 20 g of Health Claim category olive oil daily, as part of a varied, balanced diet and a healthy lifestyle, can help you benefit from these protective effects.
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