The Study
Oxidative Stability and Genotoxic Activity of Vegetable Oils Subjected to Accelerated Oxidation and Cooking Conditions
This study is like testing what happens when you leave oil in a hot oven — it found that the oil changes and makes new smelly chemicals. But it didn’t test if those chemicals hurt people, so we can’t say if eating the oil is safe or not.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
When you cook with certain oils, they break down and make smelly, toxic chemicals—but not all oils do this the same way.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 56 / 100
Quality score
Snapshots of a population at a single point in time, or descriptions of small groups. Can identify correlations and prevalence, but cannot determine cause and effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes—cooking unsaturated oils like grape seed or rapeseed creates lots of toxic aldehydes, but surprisingly, they didn’t damage DNA in this test.
- 2After 90 minutes at 180°C: coconut oil made 35x more smelly stuff, grape seed 30x, rapeseed 18x.
- 3Aldehydes (toxic chemicals) made up 60-90% of those smells.
- 4Coconut oil stayed stable.
- 5No DNA damage found in bacteria tests.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Foods
Year
2023
Authors
D. Ansorena, R. Ramírez, A. López de Cerain, A. Azqueta, I. Astiasarán
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.