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Postprandial glycaemic response to berry nectars containing inverted sucrose
Riitta Törrönen1, Jarkko Hellström2, Pirjo Mattila2
1Department of Clinical Nutrition, Institute of Public Health and Clinical Nutrition, University of Eastern Finland, PO Box 1627, FI-70211 Kuopio, Finland.
Journal of Nutritional Science
|June 17, 2017
Summary
Sucrose inversion in berry products does not significantly alter blood sugar responses. Blackcurrant and lingonberry nectars, even with inverted sucrose, show beneficial effects on glycaemic and insulinaemic responses compared to a sugar reference drink.
Area of Science:
- Nutrition Science
- Food Chemistry
- Human Physiology
Background:
- Sucrose is a common sweetener in berry products.
- Sucrose can invert to glucose and fructose during processing and storage.
- Polyphenol-rich berries may attenuate postprandial glycaemic response to intact sucrose.
Purpose of the Study:
- To investigate the impact of sucrose inversion on postprandial glycaemic and insulinaemic responses.
- To compare responses to blackcurrant and lingonberry nectars (inverted sucrose) with a reference drink.
- To assess if sucrose inversion affects the previously observed glycaemic benefits of berry consumption.
Main Methods:
- A randomized, controlled, cross-over study with 18 healthy volunteers.
- Participants consumed 300 ml of blackcurrant nectar, lingonberry nectar, or a reference drink (water with glucose and fructose).
- Blood glucose and insulin levels were measured over 120 minutes post-consumption.
Main Results:
- Inverted sucrose in the reference drink elicited responses similar to intact sucrose.
- Blackcurrant nectar attenuated early glycaemic response and improved the glycaemic profile compared to the reference.
- Lingonberry nectar reduced the insulinaemic response compared to the reference.
- Responses to inverted sucrose in berry nectars were similar to those with intact sucrose.
Conclusions:
- Sucrose inversion has no major impact on the glycaemic response to sucrose-sweetened berry products.
- Blackcurrant anthocyanins may inhibit intestinal glucose absorption, contributing to attenuated glycaemic response.
- Berry nectars, even with inverted sucrose, offer potential benefits for glycaemic and insulinaemic control.
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