Many people think about sugar, salt, or calories when they worry about unhealthy foods. But scientists are now looking closely at another ingredient that appears in many everyday products: a type of fat called palmitic acid.
This fat is commonly found in palm oil, which is widely used in processed foods around the world.
Palm oil is one of the most common vegetable oils used by the food industry. It appears in snacks, cookies, baked goods, chocolate spreads, instant noodles, and many packaged foods. It is also used in cosmetics, soaps, and shampoos. Because palm oil is inexpensive and has a long shelf life, manufacturers use it in thousands of products sold in supermarkets.
A new scientific study suggests that palmitic acid, the main fat in palm oil, might influence how cancer spreads in the body. The research was carried out by scientists at the Institute for Research in Biomedicine (IRB Barcelona) in Spain. The team was led by Professor Salvador Aznar‑Benitah. Their findings were published in the scientific journal Nature.
One of the most dangerous features of cancer is its ability to spread from one part of the body to another. This process is called metastasis. When cancer begins, it usually starts in a single organ or tissue.
But cancer cells can sometimes break away from the original tumor. These cells travel through the bloodstream or lymph system and form new tumors in other organs. Metastasis is responsible for most cancer deaths because it makes the disease much harder to treat.
Doctors have developed many treatments to shrink tumors or slow cancer growth. However, preventing metastasis remains one of the biggest challenges in cancer medicine. Because of this, scientists are very interested in learning what factors might influence how cancer spreads.
The research team wanted to understand whether certain fats in food might affect the behavior of cancer cells. Fats are made of molecules called fatty acids. Some fatty acids are important for the body and help maintain healthy cells. Others may have different effects depending on how they interact with the body’s biological systems.
In this study, the scientists focused on palmitic acid. They wanted to see whether exposure to this fat could change how cancer cells behave. The researchers tested its effects on two types of cancer: oral cancer, which develops in the mouth, and melanoma, a serious form of skin cancer.
To investigate the effect of this fat, the scientists carried out experiments using laboratory mice. The mice were fed diets that contained palmitic acid. The researchers then observed how the cancer cells behaved.
The results were striking. Cancer cells exposed to palmitic acid were much more likely to spread to other parts of the body. The tumors became more aggressive and metastasis occurred more easily.
Even more surprising was what happened after the fat was removed from the animals’ diets. The cancer cells continued to behave aggressively. In other words, the cells appeared to “remember” their exposure to palmitic acid.
Scientists believe this memory happens because of something known as epigenetic changes. Epigenetics refers to changes in how genes are turned on or off inside cells. The genes themselves are not altered, but the way the cell uses them changes. A simple way to imagine this is like turning light switches on or off in a house without changing the electrical wiring.
According to the researchers, palmitic acid seemed to activate certain genetic programs that help cancer cells spread and survive in new environments. These changes made the cancer cells better at invading nearby tissues and forming new tumors in other organs.
The team also noticed another unusual effect. Cancer cells exposed to palmitic acid developed networks that looked similar to nerve structures around the tumor. These networks appeared to help the cancer communicate with surrounding tissues and move through the body more easily. This made metastasis even more effective.
Although these findings sound worrying, the researchers stress that the study is still in an early stage. The experiments were performed in laboratory models, and more research is needed to understand exactly how this process works in humans.
The good news is that scientists are already working on ways to block the harmful effects discovered in this study. The research team is exploring treatments that could interrupt the biological changes triggered by palmitic acid. If successful, these therapies might help stop cancer from spreading.
Clinical trials are expected in the future to test whether these new strategies can work safely in people. If they succeed, the discoveries could lead to new medicines designed specifically to prevent metastasis.
For now, the scientists say it is too early to recommend major changes to people’s diets based on this single study. Nutrition and cancer are extremely complex topics, and many factors influence cancer risk.
Still, the research raises important questions about how the foods we eat may influence diseases such as cancer. Because palm oil is so widely used around the world, understanding its effects on human health could have important implications in the future.
If you care about cancer, please read studies that a low-carb diet could increase overall cancer risk, and berry that can prevent cancer, diabetes, and obesity.
For more health information, please see recent studies about how drinking milk affects the risks of heart disease and cancer and results showing vitamin D supplements could strongly reduce cancer death.
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