Publications for Proline betaine being present in Orange juice

1. Lang R, Lang T, Bader M, Beusch A, Schlagbauer V, Hofmann T: High-Throughput Quantitation of Proline Betaine in Foods and Suitability as a Valid Biomarker for Citrus Consumption. J Agric Food Chem. 2017 Mar 1;65(8):1613-1619. doi: 10.1021/acs.jafc.6b05824. Epub 2017 Feb 16. [PubMed:28158941 ]
2. Slow S, Donaggio M, Cressey PJ, Lever M, George PM, Chambers ST: The betaine content of New Zealand foods and estimated intake in the New Zealand diet Journal of Food Composition and Analysis.