Es wurde festgestellt, dass eine gesunde Fettsäure in Olivenöl und Nüssen Immunzellen, die auf die Krebsbekämpfung bei Mäusen spezialisiert sind, „auflädt“. Unterdessen schwächt eine andere Art natürlicher Fettsäure diese Zellen und kann die Fähigkeit des Körpers, das Tumorwachstum abzuwehren, beeinträchtigen.

From the article: In a groundbreaking study, a healthy fatty acid in olive oil and nuts has been found to „supercharge“ immune cells specialized to fight cancer. Meanwhile, another kind of natural fatty acid undermines these cells and may diminish the body’s ability to stave off tumor growth.

Medical researchers from the University of Hong Kong (HKUMed) have found that oleic acid (OA) – the kind found in olive oil – boosts γδ-T cells (or delta gamma T cells). The team made the discovery while investigating how different dietary fatty acids could influence this small subset of T cells that act as rapid-response soldiers against infection and tumor growth.

These immune cells are also known to become dysfunctional in people with obesity or those who have a diet high in saturated fats.

The researcher isolated human γδ-T cells and grew them in culture, then exposed a set of them to OA, and another to palmitic acid (PA), which is commonly found in palm oil, meat and dairy products. They then assessed cell survival, metabolic activity and tumor-killing ability. The OA-treated cells were not just viable but showed indications of their metabolism running at full strength, their mitochondria stayed stable, their signaling was balanced and their tumor-killing machinery was intact.

„Our research [suggests](https://www.nature.com/articles/s41392-025-02295-8) that dietary fatty acid supplementation, particularly with foods rich in OA, such as olive oil and avocados, could enhance γδ-T cell immunosurveillance, leading to more effective cancer treatments,“ said lead author Tu Wenwei, a professor in the Department of Paediatrics and Adolescent Medicine at HKUMed.

However, cells exposed to PA suffered metabolic failure and inflammatory self-destruction. Essentially, their energy machinery broke down and they died in a way that made the surrounding immune system environment even more hostile. So if OA can bolster and strengthen T cell responses to tumors, PA essentially did the opposite.

„The results indicate that cancer patients should avoid PA and consider OA supplementation in their diets to improve clinical outcomes of γδ-T cell-based cancer therapies,“ said Tu.

So basically the finding directly contradicts RFK Jr.’s claims that tallow is more healthy, and is yet another nail in the coffin of that debunked idea. What a shocker that he is not correct……

Tallow, according to wikipedia, has 47% OA and 26% PA. By contrast, canola/rapeseed oil has 61% OA and 4% PA.

Seems consistent with the still heavily researched, but not exactly newly found pathways for metabolisation of n-3 and n-6 fatty acids, where n-3 tends to be anti inflammatory and n-6 pro inflammatory