Scientists think that looking at the balance between different types of broken-down fats might help tell how much oil has been used for frying.
Scientific Claim
During deep-frying of potato chips in high-oleic sunflower oil, the ratio of E,E-/E,Z-hydroxy-FA, the cis-/trans-epoxy-FA ratio, and the threo-/erythro-dihydroxy-FA ratio change in a way that may help assess oil heating status.
Original Statement
“Based on these data, we suggest that the ratio of E,E-/E,Z-hydroxy-FA, in combination with the cis-/trans-epoxy-FA ratio, as well as the threo-/erythro-dihydroxy-FA ratio are promising new parameters to evaluate the heating of edible oils and to characterize the status of frying oils.”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design cannot support claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The authors use 'suggest' and 'promising new parameters,' indicating hypothesis generation, not validation. The claim correctly uses non-causal language. Based on abstract only - full methodology not available to verify
Evidence from Studies
Supporting (1)
<i>Trans</i>-Hydroxy, <i>Trans</i>-Epoxy, and <i>Erythro</i>-dihydroxy Fatty Acids Increase during Deep-Frying
When potato chips are fried in this special oil, certain chemical changes happen that are different depending on how much the oil has been heated — and scientists found that measuring three specific ratios of these chemicals can tell you how worn out the oil is.