Improved Quality Attributes in Soy Yogurts Prepared From DAG Enriched Edible Oils and Edible Deoiled Soy Flour

Diacylglycerols (DAGs), particularly the 1, 3-isoform, have immense potential health benefits with regards to post prandial lipemia and obesity. DAG enriched edible oil fortified soy yogurts are developed using edible decorticated and deoiled soy flour instead of using whole soybean seed. DAG enriched oils are prepared by enzymatic glycerolysis from different edible oils namely soybean, sunflower, rice bran, mustard, and sesame oil. All DAG oil enriched soy yogurts exhibit higher oxidative stability and antioxidant activity than the control soy yogurt during storage at 4 degrees C. The extent of proteolysis by Lactobacillus spp. and Streptococcus spp. is enhanced by the presence of DAG-enriched edible oils as shown by a substantial increase in o-phthaldialdehyde values. The results exhibit that the addition of rice bran oil-DAG improves the physicochemical properties, microbiological as well as proteolytic activity of soy yogurts and enables a novel technological approach for making fortified soy yogurts with enhanced health-benefit ingredients.Practical application: DAG enriched edible oils may be considered as novel functional food ingredients for soy yogurt production. Thus, development of functional soy yogurt with DAG enriched edible oils is an alternative for a value-added product with better physicochemical properties, microbiological as well as proteolytic activity compared with conventional soy yogurts. The process is commercially economical in view of the uses of seed flour as direct raw material without odor problems for making non-dairy food products. Soy yogurt with DAG enriched edible vegetable oils can be protected from adverse external conditions with potential benefits in food and therapeutic formulations for improved efficacy and health benefits. Soy yogurts prepared from diaclyglycerol enriched edible oils can be a novel approach for soy yogurt production. The process is economical and can be shown to have improved health benefits in the final product.