Özet:

Kefir from fermented dairy products is often preferred especially in recent years due to its health effects. The microbiological content of the kefir used in the traditional method is very related to the area they obtain and directly affects the properties of the produced kefir. Therefore, it is important to study the bioactivity of the dancers used. In this study, a comparative analysis of the bioactivities of goat and cow’s milk kefir fermented with a local danc and commercial danc from the region of Antalya, Turkey was made. For this purpose, microbiological analyses of kefir samples, antibacterial, antioxidant activity analyses, the total phenolic substance and the total amount of flavonoids have been determined. The results we obtain show that the antioxidant and antibacterial activities of the kefir obtained by local dancers are quite close to those produced by commercial dancers, and that it is also an alternative that consumers can safely use in terms of phenolic substances and flavonoids.

Anahtar Kelimeler:

Özet:

For recent years fermented milk products, especially kefir, are highly preferred food product due to their positive and therapeutic effects on health. Microbial composition of the kefir grains directly related with the region they are obtained and affect properties of kefir straightforwardly in traditional fermentation method. Therefore, bioactivity investigation of kefir grains used in fermentation process has great importance. In this study, comparative bioactivity analysis of cow milk and goat milk kefirs fermented with one local grain obtained from Antalya, Turkey and one commercial grain are demonstrated. For this purpose, microbiological analysis, antibacterial and antioxidant activity analysis, total phenolic and total flavonoid compound measurements of kefir samples were done. Our results concluded that, antibacterial and antioxidant activity of kefirs fermented with local grain are almost similar to those fermented with commercial grain and local grain kefirs can be a valuable and safe alternative for consumers due to its phenolic compound and flavonoid content.