The effect of aqueous extracts of some plants on in vitro antioxidant and antidiabetic activity of probiotic yogurt

In this study, aqueous extracts of some medicinal and aromatic plants (garlic, Turkish Oregano, rosemary, basil, and peppermint) were used in probiotic yogurt production to increase functionality of probiotic yogurt. The in vitro antidiabetic, antioxidant activity, total phenolic compound content and phenolic compounds of yogurts were evaluated during the 28 day of storage period. Yogurt sample with Turkish Oregano had the highest alpha-amylase and alpha-glucosidase inhibitory activity. A strong correlation was found between total phenolic compound content and antioxidant activity (r = 0.84) and between total phenolic compounds content and alpha-amylase inhibitory activity (r = 0.82). In conclusion, it can be said that the total phenolic compound content and in vitro antioxidant and antidiabetic activities of probiotic yogurt could be increased by adding aqueous extracts of some plants.