Why We Talk About Mental Health

Every year, on October 10th, we celebrate World Mental Health Day. It is a reminder that mental well-being is just as important as physical health. Today, more than 280 million people worldwide live with depression – and the need for comprehensive solutions is greater than ever.

Treatment is not limited to medication or psychotherapy. Our lifestyle – diet, exercise, and sleep – is a key part of both prevention and management. And here, high-phenolic olive oil, the jewel of the Mediterranean diet, has its own story to tell.

The Iranian Study: Hope Through Tradition

A recent clinical study in Iran examined for the first time the direct impact of extra virgin olive oil on depression:

•Adults with major depressive disorder participated.
•For 52 days, one group consumed 25 mL of olive oil daily (about two tablespoons), while the other group received sunflower oil.
•The result was clear: those who consumed olive oil had a significant improvement in depressive symptoms, especially patients with more severe forms of the condition.

This finding shows that a simple, daily dietary habit can meaningfully contribute to mental health.

The Value of High-Phenolic Olive Oil

The “key” behind these results lies in the polyphenols – unique natural compounds found in high concentrations in early-harvest olive oil.

Research shows that polyphenols:

•Fight inflammation, which is closely linked to depression.
•Protect brain cells from oxidative stress.
•Regulate the gut microbiome, influencing gut–brain communication.
•Enhance neuroplasticity, the brain’s ability to renew itself.

Thus, high-phenolic olive oil is not just a “healthy fat.” It is a nutraceutical – a food with proven biological effects that go beyond basic nutrition, touching upon both prevention and health support.



What International Research Shows

The Iranian study fits into a broader framework:

•PREDIMED in Spain showed that the Mediterranean diet with olive oil reduces the risk of developing depression.
•The SMILES trial in Australia proved that dietary change towards a Mediterranean pattern led to remission of symptoms in patients with moderate and severe depression.
•Observational studies in large populations show that those who consume more olive oil have lower rates of mental disorders.

High-Phenolic Olive Oil and Neurodegenerative Diseases

The value of high-phenolic olive oil is not limited to depression. A wealth of studies show that its polyphenols can also act protectively in neurodegenerative diseases such as Alzheimer’s, Parkinson’s, and Mild Cognitive Impairment (MCI).

•In experimental studies, oleocanthal was found to enhance the clearance of beta-amyloid from the brain, a protein that accumulates in Alzheimer’s.
•Hydroxytyrosol and tyrosols demonstrated the ability to reduce the aggregation of alpha-synuclein, a pathological hallmark of Parkinson’s disease.
•Clinical studies in Greece showed that consuming high-phenolic olive oil in older adults with MCI improved their cognitive performance.
•Large epidemiological studies (e.g., in >92,000 individuals) found that consuming more than 7 g of olive oil daily was associated with a 28% lower risk of dementia-related death.

These findings highlight that high-phenolic olive oil acts as a neuroprotective nutraceutical, through mechanisms such as:

•reducing inflammation and oxidative stress,
•improving blood–brain barrier function,
•enhancing neuroplasticity,
•and protecting against the toxic accumulation of pathological proteins.

All of this reinforces the view that olive oil can serve as a natural ally in the prevention and support of mental and neurological health. However, as with depression, more large human clinical trials are needed to clarify its true potential in treating neurodegenerative diseases.


More Research Is Needed

Despite the encouraging evidence, studies are still limited. To fully understand the power of high-phenolic olive oil for mental and neurological health, we need:

•Larger clinical trials with standardized high-phenolic olive oils.
•Research exploring its action in various mental and neurodegenerative diseases.
•Combined studies to determine whether olive oil can enhance the effectiveness of therapies.

✅ Key Takeaways

World Mental Health Day reminds us that caring for the mind requires a multidimensional approach.

High-phenolic olive oil is a nutraceutical with proven effects on inflammation, oxidative stress, and brain protection. Early clinical data show it can significantly reduce symptoms of depression and act as a shield against neurodegenerative diseases.

A simple daily amount – about two tablespoons of high-phenolic EVOO – can be a small but powerful step in supporting our mental and neurological health, alongside established treatments and a healthy lifestyle.

Selected References
1. Foshati S. et al. (2022). Extra-Virgin Olive Oil Improves Depression Symptoms in People With Major Depressive Disorder: A Randomized Clinical Trial. J Acad Nutr Diet.
2. Sánchez-Villegas A. et al. (2013). Mediterranean dietary pattern and depression risk: the PREDIMED randomized trial. BMC Medicine.
3. Jacka F.N. et al. (2017). A randomised controlled trial of dietary improvement for adults with major depression (the SMILES trial). BMC Medicine.
4. Sánchez-Villegas A. et al. (2011). Dietary fat intake and the risk of depression: the SUN Project. J Affect Disord.
5. Barbalace M.C. et al. (2024). Oleocanthal as a potential modulator of neuroinflammation. Antioxidants.
6. Batarfi W.A. et al. (2024). Hydroxytyrosol: A Pharmacological Review. Pharmaceutics.
7. Farr S.A. et al. (2019). Extra-Virgin Olive Oil improves cognition and neuropathology in Alzheimer’s models. Aging Cell.
8. Rigacci S. et al. (2016). Olive oil phenolics against age-associated neurodegeneration. Antioxidants.
9. Karampela I. et al. (2020). High-phenolic early-harvest EVOO and cognitive improvement in mild cognitive impairment. Nutrients.