Physicochemical, rheological, and microbiological properties of honey-fortified probiotic drinkable yogurt
Journal: "Foods and Raw materials" Journal (Vol.13, No. 2)Publication Date: 2024-11-20
Authors : Zehra Albay; Mehmet Celebi; Bedia Simsek;
Page : 320-329
Keywords : Drinkable yogurt; flower honey; pine honey; thyme honey; functional foods; dairy drinks;
Abstract
This study aimed to investigate the physicochemical, rheological, and microbiological attributes of drinkable yogurts prepared with three distinct types of honey (flower, pine, and thyme) in amounts of 10 and 20% and probiotic cultures (Lactobacillus acidophilus and Bifidobacterium spp.). The control sample was brighter while the yogurt containing 20% pine honey was more yellow during storage (21 days). The samples’ serum separation quantities rose together with the honey ratio. All the honey-fortified drinkable yogurts were found to be non-Newtonian pseudoplastic liquids that are thixotropic. However, as the honey ratio increased, the apparent viscosity and consistency coefficients increased, too. After 21 days of storage, L. acidophilus and Bifidobacterium spp. counts rose to more than 5.0 log CFU/mL in the experimental yogurts containing honey (except for the sample with 20% flower honey). The panelists preferred the 10% honey-fortified drinkable yogurts over the others. The yogurts with flower honey were mostly favored, followed by pine and thyme honeys. Although honey contributed to the properties of drinkable yogurt, adding more than 10% of honey degraded the product’s quality and acceptability. In conclusion, 10% is an optimal amount for flower and pine honey, with a smaller amount recommended for thyme honey. More research is needed on honey-fortified drinkable yogurt for its commercial production.
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