The Effects of Adding a Gel-Alike Curcuma longa L. Suspension as Color Agent on Some Quality and Sensory Properties of Yogurt

Angélica Serpa Guerra, Catalina Gómez Hoyos, Jorge Velásquez-Cock, Lina Vélez, Piedad Gañán, Robin Zuluaga

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Color is an important characteristic of food products. This characteristic is related to consumer acceptability. To use the entire rhizome of Curcuma longa (CL) as a food colorant, a novel gel alike stable suspension (CLS) was previously developed using cellulose nanofibers (CNFs). Therefore, the present study was conducted to evaluate the CLS as a color additive on a stirred yogurt. Three concentrations of CLS were studied (0.1, 0.125, and 0.15 wt. %) and compared to yogurt without CLS. The obtained yogurts were characterized through the determination of pH, titratable acidity, syneresis, color and curcumin content after 1, 7, 14, and 21 days of storage. Additionally, rheological and sensory measurements were performed on the samples after one day of storage. Results show that the addition of CLS does not affect the pH and titratable acidity of the samples, but all the yogurts showed an increase in their syneresis during the storage time, showing a breakdown of the gel structure. Furthermore, the CLS suspension has the ability to impart a yellow color to yogurts, a characteristic that was stable during storage. Finally, the addition of 1 wt. % or 1.25 wt. % of CLS allows the development of a yogurt with adequate sensory perception.

    Original languageEnglish
    Article number946
    JournalMolecules (Basel, Switzerland)
    Volume27
    Issue number3
    DOIs
    StatePublished - 1 Feb 2022

    Bibliographical note

    Funding Information:
    Funding: This research was funded by the Ministry of Science, Technology and Innovation of the Colombian Government (MINCIENCIAS) (grant number: 727, 2015; contract number: 80740-126-2019). This project was financed by resources from the Research Center for Investigation and Development (CIDI) of the Universidad Pontificia Bolivariana.

    Publisher Copyright:
    © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

    Keywords

    • Cellulose nanofibers
    • Color agent
    • Curcuma longa suspension
    • Yogurt

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