δ15n (1)

 δ13C and δ15N values of the proteins extracted from fifty-six Tetra Pak milk samples originating from four continents, including Australia (with New Zealand), Europe (Germany and France), North America (the United States) and Asia (China), were determined using elemental analyser-isotope ratio mass spectrometry (EA-IRMS). Significant differences (P < 0.05) were found in the δ13C and δ15N values between these four regions, verifying their potential as “fingerprints” of the geographical origin of milk. 

Read the full research article at: Geographic Origin of milk

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