After heating for 6 days, the oil with plant extract has much less of the bad chemicals that form when oil goes bad, compared to plain oil.
Scientific Claim
After 144 hours of heating at 120 °C, avocado oil fortified with methanol or ethyl ether extract of Aristotelia chilensis leaves shows significantly lower levels of secondary oxidation products (measured by k270 absorption) than unfortified oil.
Original Statement
“Regarding the absorption coefficient k270... a separation of the curves (OP, OE, and OM) can be observed after heating for 140 h, with a significant difference of the values of k270 (p < 0.05; p = 5.8 × 10−12) at 144 h.”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
definitive
Can make definitive causal claims
Assessment Explanation
The claim is based on direct spectrophotometric measurements with statistical validation (p < 0.05). The verb 'shows' accurately reflects the observed data without overgeneralization.
Evidence from Studies
Supporting (1)
Adding natural extracts from maqui leaves to avocado oil helps it resist damage from heat better than plain oil, and this was proven after 144 hours of heating.
Technical explanation
The study supports the claim by demonstrating that avocado oil fortified with methanol and ethyl ether extracts of Aristotelia chilensis (maqui) leaves exhibits significantly reduced secondary oxidation products compared to unfortified oil after heating at 120 °C. Although the study measures oxidation beyond 144 hours (up to 386 h), it explicitly states that 'secondary degradation compounds showed significant differences between the fortified and non-fortified samples after 144 h', directly aligning with the claim’s time point. The methanol extract, with a phenolic content of 4100.9 ppm and antioxidant activity of 19,452.5 µmol Trolox eq/g, showed superior protection, corroborating the efficacy of the fortification. Additionally, the delayed onset of degradation (7 °C higher Tonset) and later reaching of polar compound limits in fortified oils further confirm enhanced oxidative stability. These findings validate the claim’s core assertion regarding reduced secondary oxidation products in fortified oil at 144 hours.