We evaluated the effects of processing – pasteurization and yoghurt manufacturing – on some health-promoting lipidome components in milk from two feeding treatments – brushland grazing or hay-feeding in confinement – in dairy goats. The contents of fat and protein were higher, and of urea, lower, in grazing goats. Fatty acid composition – at the exception of saturated fatty acids – was affected by dietary management and milk processing. Phospholipid contents was lower in confined goats, with little effect for processing. The phospholipid-to-triglyceride ratio was decreased by pasteurization. Sensitivity to pasteurization of phospholipid composition differed between feeding treatments. The percentage of sphingomyelin increased following pasteurization, with no response for fermentation to yoghurt. These results can be exploited to modulate health-promoting fats in dairy products.
Bibliographical noteFunding Information:
This study was supported by the Joint fund of the Chief Scientist of the Israeli Ministry of Health and the Israeli Dairy board . We are indebted to the Ramat Hanadiv Nature Park staff, and in particular to Mr Hugo Yan Trago for allowing us to use the Ramat HaNadiv goat flock for this study.
© 2020 Elsevier Ltd
- Fatty acid