What are the High Polyphenols Olive Oils?
These oils belong to a rare, special category of oils also known as Health Claim Olive Oils under the relevant food regulations because of the scientifically recognised Health Benefits they offer.
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 health claim category olive oil.
Published research on Olive Oil polyphenols
Cardiovascular Research
Brain Function - Cognition Research
Blood Sugar / Diabetes Research
Joints Arthritis Research
Oxidative-Stress & Ageing Research
Gut Microbiome Research
Inflammation and autoimmune disease 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, certified richness in polyphenols – Health Claim Category, and exquisite flavor.
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
Lab-Certified Polyphenols: +1200 mg/kg. A rare superfood type of olive oil.
100% Certified Organic:
No chemicals. No shortcuts. Just pure, sun-grown olives from our Greek organic farms — as nature intended. Certified by BIOHELLAS and SOIL Association inspected/licenced 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
Four Family Generations of Transparent Sustainale Farming
Family-grown with care. Fully transparent and Certified harvest from Cultivation to Distribution
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 true superfood type of olive oil. Lab-certified for its valuable polyphenols, known to reduce inflammation, protect cells, and support overall wellness and long- term health.
100% pure Extra Virgin Olive Oil:
Pure, ethical & sustainable. From the sunlit groves of Greece — limited Family Groves production.
Award-Winning Quality
Expert-approved excellence for Best EVOO Quality
Early Harvest, First Press, Cold Extracted:
New Fresh Harvest (November 2025). Fresh taste, maximum nutrients
Four Family Generations of Transparent Sustainale Farming
Family-grown with care. Certified harvest from Cultivation to Distribution
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, Medical Grade 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 antioxidant and health benefits 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 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 can help you benefit from these protective effects.
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