Human study: Anthocyanin-rich blackcurrant extract reduces postprandial blood sugar
In a human study designed by Glaxosmithkline and Döhler, a blackcurrant extract (BerryPharma® by Iprona,Lana, Italy) was observed to significantly reduce early plasma glucose response as well as reduce plasma insulin concentratons within the first 30mins after consumption. Glucagon-like protein-1 (GLP-1) was also reduced at about 90 minutes after consumption of the blackcurrant extract and Gastric inhibitory polypeptide (GIP) was significantly reduced as well.
The randomized, double-blind, crossover trial was carried out at the Diabetes & Nutritional Sciences Division, Kings College London, and involved 14 male and 9 female partcicipants with a mean age of 46 years.
The participants received low sugar fruit drinks containing varying doses of the membrane enriched blackcurrant extract (150mg, 300mg, 600mg) immediately before a high-carbohydrate meal.
According to the conclussion by the researchers, the results show that consumption of blackcurrant extract equivalent to about 100g blackcurrant reduced postprandial glycaemia, insulinemia, and incretin (GLP, GIP) secretion.
This suggests that blackcurrant polyphenols are worth including in foods for cardiovascular benefits. (DOI: 10.1016/j.jnutbio.2016.09.002)
The blackcurrant extract used in this study was extracted using Iprona AG´s proprietary membrane ultrafiltration process, a purely mechanical process which uses semipermeable mebranes to sepearate molecules by size and polarity. As opposed to conventional extraction methods which use chemical extraction solvents like ethanol, Iprona´s ultrafiltration process more efficiently preserves the original food matrix of the fruits as well as preserves the aroma.
This technology, which in essence is an enrichment process because it enriches the active components in the fruit extract, has been successfully used to enrich fruit powders and to concentrate polyphenol-rich berries including the Haschberg black elderberry,, Aronia berries and the new “black” Nerina strawberries.
Visit our article detailing the benefits of membrane enrichment for fruit extracts: http://the-berry-room.com/693-2/