Food Science and Technology

Determination of acrolein generation pathways from linoleic acid and linolenic acid: increment by photo irradiation

S. Kato, N. Shimizu, et al.

This study led by Shunji Kato and colleagues uncovers new pathways for acrolein generation from linoleic and linolenic acids through singlet oxygen oxidation. It reveals that these pathways significantly contribute to acrolein production during the photo irradiation of LA-rich oils, providing crucial insights for oil storage and processing to mitigate acrolein exposure.

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Abstract

This study reinvestigated acrolein generation pathways from linoleic acid (LA) and linolenic acid (LnA) focusing on singlet oxygen (¹O₂) oxidation (type II photo-oxidation). Standards of major fatty acid hydroperoxide (FAOOH) isomers were prepared and analyzed. ¹O₂ oxidation products of LA and LnA, but not oleic acid (OA), were significant acrolein sources. Acrolein formation from LA-rich oils increased with photo irradiation. ¹O₂ oxidation-specific HpOTE isomers (10- and 15-HpOTE) yielded twice the acrolein compared to other HpOTE isomers. This study provides a new acrolein formation pathway from type II photo-oxidation, informing oil storage and processing to reduce acrolein exposure.

Publisher

npj Science of Food

Published On

Apr 12, 2022

Authors

Shunji Kato, Naoki Shimizu, Yurika Otoki, Junya Ito, Masayoshi Sakaino, Takashi Sano, Shigeo Takeuchi, Jun Imagi, Kiyotaka Nakagawa

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