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Oxidative status of a yogurt-like fermented maize product containing phytosterols

Descalzo, AdrianaMaría, Rizzo, SergioAníbal, Servent, Adrien, Rossetti, Luciana, Lebrun, Marc, Pérez, CarolinaDaiana, Boulanger, Renaud, Mestres, Christian, Pallet, Dominique, Dhuique-Mayer, Claudie
Journal of food science and technology 2018 v.55 no.5 pp. 1859-1869
beta-carotene, beta-cryptoxanthin, bioactive compounds, cold storage, corn, emulsions, esterification, gamma-tocopherol, lipid peroxidation, lutein, oxidative stability, phytosterols, refrigeration, yogurt, zeaxanthin
This work describes the formulation of a functional yogurt-like product based on fermented maize with added phytosterols and its oxidative stability during cold storage. The technological challenge was to stabilize 3.5% esterified phytosterols (between 2 and 3 g of free sterols) in a low-fat emulsion and to preserve the obtained product throughout processing and storage. The natural bioactive compounds: lutein, zeaxanthin, β-cryptoxanthin, β-carotene and γ-tocopherol were detected in the yogurt, and remained stable during 12 days of refrigeration. Higher content of C18:1 n-9 and C18:3 n-3 (six and ninefold, respectively) were obtained in samples with phytosterols. This was desirable from a nutritional point of view, but at the same time it induced lipid oxidation that was 1.4-fold higher in the product with phytosterols than in the controls. The use of a multivariate approach served to find descriptors which were related to treatments, and to explain their behavior over time.