Abstract
The goal of the present study was to determine the impact of the addition of enzyme-treated orange pomace to orange juice on postprandial glycemic response. Ten healthy subjects (aged 27.9 ± 7.7 years, body mass index 22.1 ± 1.1 kg m−2) participated in a randomized, 2-arm, cross-over clinical trial to test the glycemic response to 100% orange juice (OJ) or 100% orange juice with 5 g of enzyme-treated orange pomace fiber (OPF). Blood samples were collected and glucose and insulin concentrations were measured at fasting (0 min) and every 15 min for 2 h after consuming the study juice products. Analysis of the 2 h incremental area under the curve (iAUC0–2h) indicated a significant reduction in blood glucose after ingesting the OPF juice compared to the OJ, p = 0.02. Peak glucose concentrations were also lowered after the OPF juice compared to the OJ, p < 0.05. No significant difference was observed in insulin responses between treatments, p > 0.05. Overall, this study demonstrated that adding 5 g of fiber from orange pomace into a serving of OJ attenuated the postprandial glucose response.
Highlights
Orange pomace is a byproduct of orange juice (OJ)production and is a rich source of fiber
Overall 2-h postprandial glucose responses as estimated by incremental area under the curve (iAUC) were significantly lowered after consuming the orange pomace fiber (OPF) compared to the OJ (13.5 ± 12.7 vs. 48.5 ± 15.3 mmol min L−1, p = 0.02, respectively) (Fig. 1a)
No significant effect on the glucose time maximum (Tmax) was observed between the two treatments, there was a slight delay in the Tmax after the OPF compared to the OJ (33.0 ± 6.3 vs. 31.5 ± 4.7 min, p > 0.05)
Summary
Production and is a rich source of fiber. It contains an edible portion of the fruit that includes segments, broken pulp sacs, and a center core. Fiber is an important part of a healthy diet and known to attenuate the glycemic response to foods[1,2,3]. It has been demonstrated that the addition of 5.5 g of fiber from orange pomace to 100% OJ attenuated the glycemic response at certain time points across 7 h and two high fat meals in an overweight population[7]. A study conducted by Chen et al.[8] demonstrated that the acute consumption of a beverage consisting of orange pomace (5.48 g fiber) with a breakfast meal significantly decreased postprandial glycemic and insulinemic excursions in overweight men[8]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
