2.1. Red Beetroot Juice Pretreatment for NMR Analysis
RBJs
The subjects involved in this study drank 200 mL of commercial RBJs, which were provided by Aureli Mario S.S. Agricola and were processed in their industrial facility from beets collected in the Fucino fields of Abruzzo, Italy.First, 1.5 mL of juice was extracted following a modified Bligh–Dyer protocol [