Probiotic fruit beverages with different polyphenol profiles attenuated early insulin response

• DOI: 10.1186/s12937-018-0335-0
• Publication Date: 2018-02-27T03:06:26Z
• Authors: Jie Xu; Tommy Jönsson; Merichel Plaza; Åsa Håkansson; Martin Antonsson; Irini Lazou Ahrén; Charlotta Turner; Peter Spégel; Yvonne Granfeldt
• Keywords: Adult; Blood Glucose; Male; RC620-627; Avena; Vaccinium myrtillus; Bilberries; Plant Roots; Antioxidants; Bilberries; Blackcurrant; Mango; Rose hip; Beetroot; Postprandial insulin response; Beverages; Blackcurrant; Young Adult; 03 medical and health sciences; Ribes; Humans; Insulin; TX341-641; Nutritional diseases. Deficiency diseases; 2. Zero hunger; Mango; 0303 health sciences; Nutrition and Dietetics; Cross-Over Studies; Mangifera; Nutrition. Foods and food supply; Research; Probiotics; Rose hip; Polyphenols; Postprandial Period; 3. Good health; Postprandial insulin response; Fruit; Beetroot; Female; Beta vulgaris; Fermented Foods; Näringslära och dietkunskap; Lactobacillus plantarum

Consumption of polyphenol-rich fruits and vegetables may improve postprandial glucose and insulin levels and hence promote well-being. Previously it has been observed that consumption of bilberry decreases the postprandial insulin demand. The intention with the present study was to compare the impact of different supplements with various polyphenol profiles, on the postprandial glucose and insulin responses in healthy young adults.In a randomized, controlled, crossover study the postprandial glycemic and insulin responses were observed in eleven healthy adults after intake of five different beverages containing bilberry (European blueberry), blackcurrant, beetroot, mango and rose hip, respectively; all drinks were enriched with the same composition of fermented oatmeal and probiotics. The control was a glucose drink. The profile and content of the polyphenols in the different beverages were determined by HPLC-DAD analysis. The antioxidative capacity of the different beverages were measured by TEAC and DPPH assays.Beverages containing bilberry, blackcurrant, mango or rose hip significantly attenuated the early postprandial insulin response (0-90 min), but showed no effect on glucose response. Drinks with bilberry or rose hip reduced the insulin response from the very early phase (0-30 min), and had significantly lower insulin index compared with the control. The efficiency of the bilberry and rose hip to decrease early postprandial insulin responses correlated with higher phenolic contents.Supplements with bilberry, blackcurrant, mango or rose hip in the tested probiotic and oatmeal enriched beverage attenuated early-phase insulin response, but had no effect on the postprandial glycemic response. The improved ability of bilberry and rose hip to lower the very early phase of insulin response seems to be due to a higher phenolic content.The study was retrospectively registered at ClinicalTrials.gov with number NCT03159065 .