Cinnamomum zeylanicum and Curcuma longa incorporated dairy yoghurts with hindered glycaemic properties for healthy people

Abstract

This study mainly compare glycaemic responses of a control yoghurt (typical dairy yoghurt) against two novel yoghurt products with added spices oleoresins (Cinnamon yoghurt - Cinnamomum zeylanicum , turmeric yoghurt - Curcuma longa ) using 16 healthy volunteers in a randomized crossover study. Blood glucose concentrations were measured at fasting state and 30, 45, 60, 90, 120 min following the ingestion, using a Blood Glucose Monitoring System and blood glucose response curves were plotted. Nutritional and physicochemical properties were also compared and no significant differences ( P > 0.05) were observed between novel yoghurts and the control within the storage period. Significant reductions in peak blood glucose concentration and area under the curve (AUC) ( P < 0.05) for both novel products compared to standard dairy yoghurt was observed; revealing the reduction of glycaemic impact by spice ingredients. Peak reductions of glucose concentration for cinnamon yoghurt was 9.61%, for turmeric yoghurt was 9.26%; they were considerably lower compared to the control. Mean peak serum glucose concentration for control, cinnamon yoghurt and turmeric yoghurt were (113.38 ± 6.39), (102.50 ± 6.00), (102.88 ± 5.38) mg/dL respectively and mean AUC were (11 951 ± 523), (11 012 ± 611), (10 941 ± 530) ((mg/dL)*min) respectively. Hence novel yoghurt products are proven to be excellent sources in reducing postprandial blood glucose responses.