Expression of Concern: Liu et al. Comparison of Chemical Compositions and Antioxidant Activity of Essential Oils from Litsea Cubeba, Cinnamon, Anise, and Eucalyptus. Molecules 2023, 28, 5051

Molecules Editorial Office Molecules Editorial Office

doi:10.3390/molecules31162802

August 12, 2026MoleculesOpen Access

Expression of Concern: Liu et al. Comparison of Chemical Compositions and Antioxidant Activity of Essential Oils from Litsea Cubeba, Cinnamon, Anise, and Eucalyptus. Molecules 2023, 28, 5051

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Key Points

Alert readers and the scientific community to potential integrity and reliability concerns regarding a previously published article on essential oil chemical compositions and antioxidant activity.
Editorial review initiated by the Molecules Editorial Office regarding the 2023 publication by Liu et al.
Re-evaluation of reported chemical profiles and bioactivity analyses for Litsea cubeba, cinnamon, anise, and eucalyptus oils.
A formal Expression of Concern was issued to document editorial reservations about the validity of the study.
Readers are advised to interpret reported data on the chemical properties and antioxidant performance of the analyzed oils with appropriate caution.

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Implication

Editorial notice reports integrity concerns regarding plant essential oils, indicating the need for caution when interpreting published antioxidant data.

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Molecules Editorial Office Molecules Editorial Office (2026) studied this question.

synapsesocial.com/papers/6a7ec7bab70b84ec8b91463f https://doi.org/10.3390/molecules31162802

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Expression of Concern: Liu et al. Comparison of Chemical Compositions and Antioxidant Activity of Essential Oils from Litsea Cubeba, Cinnamon, Anise, and Eucalyptus. Molecules 2023, 28, 5051

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Expression of Concern: Liu et al. Comparison of Chemical Compositions and Antioxidant Activity of Essential Oils from Litsea Cubeba, Cinnamon, Anise, and Eucalyptus. Molecules 2023, 28, 5051

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