When oil is reused for frying, some unstable fat breakdown products disappear, but the stable ones they turn into don’t change much in amount.
Scientific Claim
During deep-frying of potato chips in high-oleic sunflower oil, concentrations of E,Z-9- and E,Z-13-hydroperoxy-LA and -ALA decrease, while their corresponding hydroxy-FA remain constant.
Original Statement
“During frying, the E,Z-9- and E,Z-13-hydroperoxy-LA and -ALA concentrations decrease while their corresponding hydroxy-FA remain constant.”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design cannot support claim
Appropriate Language Strength
definitive
Can make definitive causal claims
Assessment Explanation
The claim is a direct quote from the abstract, describing observed concentration trends without overinterpretation. 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 unstable compounds break down into more stable ones, and the study found that those unstable ones go down while the stable ones stay the same — just like the claim says.