How does extra virgin olive oil help prevent cancer according to the latest medical studies?
As early as the 16th century, the classic "Compendium of Materia Medica" of Chinese medicine compiled by Li Shizhen, a medical scientist of the Ming dynasty , already noted that olives "produce body fluids, quell polydipsia, treat sore throats and can relieve all poisons resulting from eating fish and crabs."
Cancer is a leading cause of death , and the age of onset is decreasing year after year, yet the medical community has not found an effective treatment. Studies show that olive oil not only prevents cardiovascular and cerebrovascular diseases and oxidation, but also contains a special compound that can cause cancer cells to die quickly without harming normal cells. The latest Harvard study also confirms that people who consume more than 7 grams of olive oil daily have a significantly lower risk of death.
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A study published in the journal " Molecular and Cellular Oncology " by the Rutgers University School of Environmental and Biological Sciences and Hunter College of the City University of New York noted that a component of olive oil, oleocanthal , can cause cancer cells to die within 1 hour.
Paul Breslin, one of the study's authors and an American nutritionist, explained how the mechanism works. Oleocanthal can perforate lysosomes in cancer cells, and when the lysosomal enzymes are released, they break down the organic material necessary for life , causing the cancer cells to die from lack of nutrients . This phenomenon occurs in several types of cancer cells.
The team also discovered that oleocanthal did not harm healthy cells , but simply put them into a dormant state and reactivated them after about 24 hours without negative effects. Breslin explained that current cancer treatment still relies on traditional methods such as radiotherapy, chemotherapy, and targeted therapies. Therefore, consuming sufficient olive oil offers another alternative for effective cancer treatment.
Results
Furthermore, another recent study from Harvard University also confirmed similar findings. Compared to people who never consumed olive oil, those who consumed more than 7 grams of olive oil per day had significantly lower risks.
- 19% lower rate of death from cardiovascular disease
- 17% lower cancer death rate
- 17% lower rate of neurological death
- 29% lower death rate from degenerative diseases
- 18% lower risk of respiratory death
How do the polyphenols in extra virgin olive oil act against breast cancer?
A recent study published in the Olive Oil Times suggests that olive oil may play a significant role in reducing the risk of breast cancer. The research, which analyzed the diet and health of thousands of women, found a link between regular olive oil consumption and a lower incidence of the disease.
The findings indicate that bioactive compounds present in olive oil, such as polyphenols and monounsaturated fatty acids , may be responsible for these protective effects. These components are believed to have anti-inflammatory and antioxidant properties that help combat cell damage and prevent the growth of cancerous cells.
Although the results are promising, the researchers emphasize that more research is needed to confirm these findings and fully understand the mechanisms involved. However, this study adds to the growing list of health benefits associated with olive oil consumption, highlighting its potential as an ally in breast cancer prevention . Including extra virgin olive oil in your daily diet could be a simple and delicious strategy for improving overall health.
How is Italy leading the way in research on extra virgin olive oil against cancer?
The Italian League Against Cancer (LILT) has placed extra virgin olive oil (EVOO) at the heart of its "National Cancer Prevention Week 2026," highlighting its value as a key ally for public health . Under the slogan of raising awareness about proper nutrition, the initiative emphasizes that EVOO is not only an essential ingredient in the Mediterranean diet, but also a food with protective biological properties thanks to its polyphenols and monounsaturated fatty acids, which combat inflammation and oxidative stress.
Sponsored by the Presidency of the Council of Ministers and supported by sports and health organizations, the campaign aims to educate the public on how daily consumption of this "liquid gold" can reduce the risk of various types of tumors, especially the most aggressive ones. This initiative reinforces the commitment of Italian producers to social well-being, promoting a healthy lifestyle that prioritizes primary prevention through high-quality nutrition. Ultimately, Italian extra virgin olive oil is reaffirmed as a natural shield against chronic diseases and a pillar of the country's cultural and health identity.
Dietary changes
Replacing butter with olive oil can also reduce the risk of premature death from all causes by up to 34%. In fact, data shows that replacing animal fats with unsaturated vegetable oils like olive oil for daily consumption is better for health (results published in the Journal of the American College of Cardiology ). In this respect, the Mediterranean Diet is the most widely recognized healthy dietary pattern among nutritionists today.
Omega-3 or Omega-6, to prevent cancer?
The recent study published by the University of California, Los Angeles, highlights how the proportion of fats we consume daily, specifically the balance between Omega-3 and Omega-6 , directly influences the progression of serious diseases such as prostate cancer.
According to researchers, the typical Western diet has a worrying imbalance , since most people consume 15 to 20 times more Omega-6 fats than Omega-3 fats , which generates a state of chronic inflammation that favors the multiplication of tumor cells.
Omega-6 fats are abundant in common industrial vegetable oils used in cooking, as well as in fried foods and ultra-processed products that dominate the current market.
Conversely, Omega-3 , which occurs naturally in fatty fish such as salmon and sardines , as well as in chia seeds or enriched eggs , acts as a protective agent that can mitigate the negative effects of excess refined oils.
In the clinical trial conducted with men under active surveillance for low-risk prostate cancer, it was shown that those who modified their intake to reduce Omega-6 and increase Omega-3 through fish oil supplements and dietary changes were able to significantly reduce the Ki-67 marker, which measures how quickly cancer cells divide.
This finding suggests that it's not necessary to eliminate fats entirely, but rather to adjust the balance toward a healthier ratio , ideally 4:1, so that the body doesn't provide the inflammatory "fuel" that cancer uses to progress. The central message of the research is that the selection of cooking oils and the choice of protein sources rich in long-chain polyunsaturated fatty acids are fundamental decisions for long-term health. By limiting the consumption of vegetable oils loaded with Omega-6 and encouraging the consumption of sources rich in Omega-3 , a cellular environment less conducive to tumor proliferation is created.
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Although larger and longer-term studies are needed to change official clinical guidelines, the current results offer a practical and accessible tool for patients to take control of their well-being. Transitioning to a diet that prioritizes Omega-3 or Omega-6 in the correct proportions not only benefits those already facing a cancer diagnosis but also improves cardiovascular and cognitive health in the general population.
Ultimately, what we put on our plate, and specifically the type of fat we use for cooking, has a much deeper biological impact than previously thought, acting as a direct regulator of cellular activity and systemic inflammation.
This straightforward and simple nutritional approach makes it clear that small adjustments, such as changing a refined seed oil for more balanced sources or increasing weekly fish intake, can be crucial in slowing the progression of chronic diseases and improving the immune system's response to cancerous processes in their early stages.







