Highlights
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Oils produced from Koroneiki cv olives with three- or two-phase decanters were compared.
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Two-phase (2-P) oils contained more total phenolics, OH-tyrosol and tyrosol.
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2-P oils exhibited higher reducing capacity & elongation of serum lipid lag time.
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2-P oils caused higher decrease in cytokine response of stimulated human PBMCs.
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2-P oils contained more volatile compounds and more C5–C6 alcohols & aldehydes.