The aim of this study was to investigate the effects of Kefir fermentation on the functional properties of
Hair and Saanen goat milk samples, including intensive and extensive nutritional regimes. Kefir samples
were produced with natural Kefir grains (2%). Microbial content, the total phenolic content, total antioxidant
activity (using ORAC and TEAC assays) and quantification of phenolic substances using liquid chromatography were carried out.
After fermentation with Kefir grains, the antioxidant activity of the Kefir samples increased. Kefir made
from goat milk had higher content of microflora and total antioxidant activity. The total phenolic contents
of the kefir samples made from different goat milk samples ranged between 726.08 and 1359.32 mg
of gallic acid equivalents (GAE) L1. The phenolic compounds in Kefir samples ranged between 0.77 and
4.21 mg 100 g1 for gallic acid and 0.36e5.09 mg 100 g1 for catechin. This study showed that goat kefir
samples had significantly high bioactive substances.