*3.3. Vitamin C Excretion in Urine*

Urinary ascorbate excretion was monitored over the eight hours following intervention with vitamin C tablets or Sungold kiwifruit and standardised to urinary creatinine concentrations (Figure 3). There was a significant increase in ascorbate excretion from two hours post intervention (*P* < 0.001) and also a significant difference between the two interventions, with enhanced ascorbate excretion observed in the kiwifruit group (*P* = 0.016, Figure 3). This difference was confirmed with ascorbate area under the time-concentration curves (Table 1). The total increase in ascorbate excretion over the eight hours indicated ~40% and ~50% excretion of the ingested dose from the supplement and kiwifruit arms, respectively (Table 1).
