2024-07-23 12:04:07
The damages of reuse frying oil are fairly well known. When cooking foods with sugars, such as starch from potatoes, Heating may lead to carcinogenic substances, as the acrylamide. In addition, with heating, the beneficial antioxidants in fats are lost and the formation of reactive oxygen species is enhanced, which precisely promotes cellular oxidation. This is also related to cancer and even metabolic or cardiovascular diseases. But until now it had not been linked to neurodegenerative pathologies.
The first to find this relationship were researchers from University of Illinois, Vinayaka University Hospital and Central University of TamilnaduIt should be noted that his research has been carried out with wheelso it would be necessary to check whether it can be extrapolated to humans. But, for now, they have seen that reusing frying oil increases the probability of neuronal degeneration, both in adult rats and in their offspring.
It is a research still in its infancy, which has just been presented at the annual meeting of the American Society for Biochemistry and Molecular Biology. Its authors believe that their results justify the need to continue researching the liver-gut-brain axis and how what we eat can affect the health of our nervous system. In addition, logically, it gives us another reason not to reuse frying oil too many times. This Easter, it is better to fry your French toast in fresh oil.
The dangers of reusing frying oil
To carry out this study, its authors took a group of female rats and fed them for 30 days with three types of food. On the one hand, a control group was fed with their standard dietwhile others took food passed through new or reheated oil.
After that month, it was found that those in the last group experienced an increase in levels of Hepatic enzymes. This relates to both the inflammation as with the oxidative stress. Both are phenomena that had already been linked to the habit of reusing frying oil. In fact, they are some of the causes of cancer or metabolic disorders. However, these scientists saw something else.
These modifications in the liver affected the way in which this organ metabolizes fats. Therefore, the Omega-3 fatty acidsknown for their great neuroprotective effect, could not be transported to the brain.
The consequence was a increased neuronal degeneration, as could be seen in the histological analysis of the rats’ brains. Likewise, there was an affectation in the colon cells, which points to that relationship between gut and brain.
If this were to occur in humans, it could trigger dementia or influence the development of diseases such as Alzheimer’s and Parkinson’s.
The study was conducted on rats.
Other effects
It was also found that both adult and offspring rats experienced an increase in cholesterol and C-reactive protein levelsThe latter is an important inflammatory marker.
All this is enhanced by the fact that the antioxidant role of some oils, such as olive oil, is lost every time it is reheated.
Therefore, it is clear that Reusing frying oil has many harmful effectsIt is not so clear that neurodegeneration is one of them. But, given the effects on rats, in the absence of further research, it is worth taking it into account when deciding how many times we use the same oil.