Heat Kills Olive Oil's Healthy Stuff
Biosensor analysis for the kinetic study of polyphenols deterioration during the forced thermal oxidation of extra-virgin olive oil.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Activation energy for polyphenol degradation was practically constant across the entire 98–180°C range.
Most people assume higher heat makes chemical reactions easier (lower energy needed), but here, the energy barrier didn’t change — meaning degradation is consistently stubborn at all tested temps.
Practical Takeaways
Use extra-virgin olive oil for dressings, drizzling, or low-heat cooking — avoid high-heat frying or roasting if you want to preserve its polyphenols.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Activation energy for polyphenol degradation was practically constant across the entire 98–180°C range.
Most people assume higher heat makes chemical reactions easier (lower energy needed), but here, the energy barrier didn’t change — meaning degradation is consistently stubborn at all tested temps.
Practical Takeaways
Use extra-virgin olive oil for dressings, drizzling, or low-heat cooking — avoid high-heat frying or roasting if you want to preserve its polyphenols.
Publication
Journal
Talanta
Year
2008
Authors
L. Campanella, Adriano Nuccilli, M. Tomassetti, S. Vecchio
Related Content
Claims (5)
Scientists can estimate how long it takes for half of the healthy compounds in olive oil to break down when it’s heated at different temperatures.
Thermal exposure during cooking degrades polyphenolic antioxidants in extra virgin olive oil, eliminating their bioactive health effects.
When you heat olive oil really hot, the healthy compounds called polyphenols break down faster the longer and hotter it gets.
The amount of heat energy needed to break down the healthy compounds in olive oil doesn’t change much, no matter how hot you heat it (within the range tested).
Scientists can calculate exactly how fast the healthy parts of olive oil break down when heated at different temperatures, using a mathematical model.