Lowering the predicted glycemic index of pasta using dried onions as functional ingredients
2022
Ombra, Maria Neve | Nazzaro, Filomena | Fratianni, Florinda
Pasta is a commonly consumed food; adding some ingredients, maybe turn it into a functional food with health benefits. These ingredients consist of dietary fiber, antioxidant molecules, and enzyme inhibitor compounds, related to a reduced risk for some diseases. Onion (Allium cepa L.) is a rich source of bioactive compounds rendering it a relevant candidate for the production of functional foods. The present study examines the in vitro starch digestibility of durum wheat pasta supplemented with 3% onion flour. The incorporation of onion flour attenuated the extent of starch digestion and accordingly the area under the curve of reducing sugars discharged during in vitro digestion. The predicted glycemic index (pGI) of pasta supplemented with onion flour (3%) was significantly lower (pGI = 54 ± 0.17) than the control pasta (pGI = 72 ± 0.14). These results indicate that 3% onion fortified pasta represents a food with potential healthy properties, showing glucose-lowering capabilities in vitro.
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