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Open AccessArticle

Consumption of Raw Orange, 100% Fresh Orange Juice, and Nectar- Sweetened Orange Juice—Effects on Blood Glucose and Insulin Levels on Healthy Subjects

1
Department of Health Sciences, CNHS, Zayed University, Abu Dhabi 144534, UAE
2
Department of Food Science and Human Nutrition, Agricultural University of Athens, 11855 Athens, Greece
3
Faculty of Medicine, University of Groningen, 9712KB Groningen, The Netherlands
4
Doctor’s Medical Center, Abu Dhabi, Abu Dhabi 46400, UAE
*
Author to whom correspondence should be addressed.
Nutrients 2019, 11(9), 2171; https://doi.org/10.3390/nu11092171
Received: 19 August 2019 / Revised: 4 September 2019 / Accepted: 5 September 2019 / Published: 10 September 2019
Objective: The aim of this study is to investigate the effect of consumption of raw orange (RO), 100% fresh orange juice (FOJ), and nectar-sweetened orange juice (NSOJ) on postprandial glucose and insulin levels in non-diabetic young Emirati women. Research Methods: This is a prospective, three-way, crossover study design. Blood records of thirteen normal weight and seven healthy obese university students were analyzed from Zayed University on three random days with the following three meal samples: 2 ROs, 100% FOJ, and NSOJ. Venous blood was collected at 0, 30, 60, 90, and 120 minutes after the respective meal consumption. Statistical analyses included repeated measures analysis of variance and calculations of the area under the glucose and insulin curves (AUC) for each one of the meal samples. Results: Total fasting glucose and insulin levels did not differ by treatment in the normal versus obese group. All three meals had no significant effects on the plasma glucose levels. However, there was a significant change in plasma insulin concentrations at 120 min compared with that at 0 min for RO: −14 (−27.05, −0.90, P < 0.001); 100% FOJ −13.7 (−28.80, 1.44, P < 0.001); and NSOJ: −9.2 (−28.75, 10.30, P < 0.001). Conclusions: This study shows that whole fresh fruit, 100% fruit juice, and sweetened fruit juice did not have a significant effect on the blood glucose levels in non-diabetic Emirati university students. However, a significant decrease in insulin response and HOMA-IR on all three sample meals was observed. View Full-Text
Keywords: raw orange; orange juice; glucose; insulin; Emirati; diabetes type 2 raw orange; orange juice; glucose; insulin; Emirati; diabetes type 2
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Papandreou, D.; Magriplis, E.; Abboud, M.; Taha, Z.; Karavolia, E.; Karavolias, C.; Zampelas, A. Consumption of Raw Orange, 100% Fresh Orange Juice, and Nectar- Sweetened Orange Juice—Effects on Blood Glucose and Insulin Levels on Healthy Subjects. Nutrients 2019, 11, 2171.

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