Dietary trans fatty acids and quality assessment of fatty acid composition in yoghurt from goat's milk from different breeds

摘要

The study was conducted with yoghurt produced by goat's milk from three breed groups - Bulgarian White Dairy (BWD) and its crosses with Anglo-Nubian (BWDxAN) and Toggenburg goats (BWDxTG) during the lactation to establish the content of natural transfatty acids (TFA) and to assess the quality of the fatty acid composition of the product as a healthy source in human nutrition. The fat in the analysed yoghurt from BWD goat breed and its crosses its average for the period are 4,60% for BWD, 5,05% for BWDxAN and 5,11% for BWDxTG.The protein content is the lowest in BWD -3.11% and relatively uniform at BWDxAN -3.37% and BWDxTG - 3,.34%. The results are similar for total solids. The lipid preventive score in goat yoghurt variesfrom 9.11 to 13.17 g/100g of product. The atherogenic index in the analyses yoghurt from the three goat groups ranges from 2.25 to 3.77 and the thrombogenic index keeps the trend of atherogenic index and is from 2.74 to 3.78. Yoghurt from different goatgroups has a content of TFA from 0.07 to 0.16 g/100 g yoghurt and is a low TFA product.The content of saturated fatty acids in the analysed goat's yoghurt ranges from 3.17 to 4.50, such as the lowest average value being found in BWD 3.58 g/100 g yoghurt and defined as yoghurt with high saturated fatty acid content (over 1.5 g/100 g yoghurt).