2023-07-08 13:30:00
Alzheimer’s, obesity, depression, anxiety… Previous research has shown that the onset of these different diseases is linked to the high consumption of soybean oil. Added to this list is ulcerative colitis, a form of inflammatory bowel disease (IBD) characterized by chronic inflammation of the large intestine. This was revealed by researchers from the University of California, Riverside, in a study published in the journal Gut Microbes. “Our work challenges the decades-old idea that many chronic diseases are due to excessive consumption of saturated fat from animal products,” said Poonamjot Deol, a researcher in the department of microbiology, who was involved in carrying out this work.
Soybean oil promotes the growth of harmful intestinal bacteria
As part of the research, the scientists examined in the laboratory the intestine of mice fed a diet rich in soybean oil for 24 weeks. Their analysis showed a decrease in beneficial gut bacteria and an increase in harmful ones. In detail, the authors found that mice fed a diet rich in soybean oil showed a reduction in the intestines of endocannabinoids, cannabis-like molecules naturally produced by the body to regulate a wide variety of physiological processes. In parallel, the intestines showed an increase in oxylipins, oxygenated polyunsaturated fatty acids that regulate inflammation. According to the results, a diet rich in soybean oil also promotes the growth of harmful bacteria, such as E. invasive coli adherent in the intestine.
Soybean oil: linoleic acid “makes the intestinal epithelial barrier porous”
According to the team, it is linoleic acid, contained in soybean oil, which “makes the intestinal epithelial barrier porous” and causes health problems. “While our bodies need 1-2% linoleic acid daily, Americans today get 8-10% of their energy from linoleic acid, most of which comes from soybean oil. Excess linoleic acid has negative effects on the gut microbiota.” said Poonamjot Deol in a statement.
THE. coli uses linoleic acid as a carbon source to meet its nutritional needs. Also, several beneficial gut bacteria present in the intestines are unable to resist linoleic acid and die, resulting in the overgrowth of harmful bacteria. “In humans, invasive and adherent E. coli has been identified as the cause of inflammatory bowel disease,” explained the authors.
Which vegetable edible oils should I choose?
According to scientists, olive oil, which contains less linoleic acid, is a healthier oil. “It promotes less the occurrence of obesity and we have just discovered that, unlike soybean oil, it does not increase the susceptibility of mice to ulcerative colitis”, said Frances M. Sladek, co-author of the study. Coconut oil and avocado oil are also other healthy options. On the other hand, the researchers point out that corn oil contains the same amount of linoleic acid as soybean oil.
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