Seasonal Variation in Stable Isotope Ratios of Cow Milk in Vilnius Region, Lithuania

Animals : an Open Access Journal From MDPI
Andrius GarbarasVidmantas Remeikis

Abstract

Various studies have shown that stable isotope analysis has the potential to verify the geographic origin of foods and drinks. However, stable isotope composition is not always constant in the environment and can even change in the same area. Dairy products are of particular interest as a group of foods that play an important role in feeding the population. The composition of milk is fundamentally dependent on the feeding of the cows, and thereby on a particular environment. To better understand the amount of variation in δ18O, δ13C, and δ15N values in the milk from the same area, we measured stable isotope ratios in cow milk water, artesian water, and precipitation (δ18O) as well as in bulk milk samples (δ13C and δ15N) collected in 2014⁻2016. Different water and food sources were available during the winter (artesian water only and dry grass) and summer (artesian water and fresh grass), and spring and autumn seasons reflected transitional periods. Oxygen stable isotope ratios in milk water were relatively lower in winter and transitional seasons and higher in summer, showing the dependence on the main water source. δ13C values reflected particular food sources. This study shows the applicability of the stable isotope ratio met...Continue Reading

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Citations

Aug 17, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Kavindra WijenayakeDianne Clarke
Sep 6, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Staša Hamzić GregorčičNives Ogrinc
Jul 8, 2021·Rapid Communications in Mass Spectrometry : RCM·Marta BoitoGiampiero Venturelli

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