Influence of Selected Plant-Derived Essential Oils on the Physicochemical, Sensory, and Oxidative Stability of Fava Bean-Based Spread During Refrigerated Storage

Abstract

Fava bean (Vicia faba L.) is a nutritionally valuable and sustainable legume with strong potential for plant-based food applications. However, similar to other lipid-containing food systems, fava bean-based spreads are susceptible to lipid oxidation during storage, leading to quality deterioration and reduced shelf life. This study evaluated the effect of basil (Ocimum basilicum L.), winter savory (Satureja montana L.), and cumin (Cuminum cyminum L.) essential oils (EOs) (0.1 μL/g) on the physicochemical properties and oxidative stability of fava bean-based spreads during 90 days of storage at 4 °C. Four treatments were prepared: control spread without essential oil (B-CO), basil essential oil-enriched spread (B-BA), winter savory essential oil-enriched spread (B-WS), and cumin essential oil-enriched spread (B-CU). Water activity and pH remained stable in all samples throughout storage. Color changes were most pronounced in the control, while B-WS exhibited the highest color stability (ΔE = 1.81 vs. 6.07 in B-CO). Winter savory and cumin significantly reduced peroxide value and thiobarbituric acid reactive substance (TBARS) formation and improved oxidative stability (Rancimat: 9.11 and 9.10 h vs. 7.73 h in B-CO), whereas basil showed no protective effect. Cumin was characterized by the highest flavonoid and phenolic acid contents, while winter savory exhibited the highest total polyphenols. Sensory evaluation revealed that EOs significantly influenced consumer acceptance, particularly taste and aroma. Although the control sample achieved the highest overall scores, cumin-containing formulations provided the most favorable balance between oxidative stability and sensory quality, whereas winter savory negatively affected overall acceptability. Taken together, winter savory and cumin EOs effectively enhanced oxidative stability, highlighting their potential as natural antioxidants in the development of plant-based spreads.