Chemical, biological and sensory evaluation of pasta products supplemented with α-galactoside-free lupin flours

Abstract

alfa-Galactoside-free lupin flour has been used to supplement durum wheat semolina flour in order to increase the nutritive value of pasta products. Supplemented pasta products had a shorter cooking time, higher cooking water absorption, cooking loss and protein loss in water than control pasta prepared with only semolina. Sensory evaluation of cooked pastas showed that products supplemented with 80 g kg−1 of alfa-galactoside-free Lupinus angustifolius var. Emir flour or with 100 g kg−1 of Alfa-galactoside-free Lupinus angustifolius var. Troll flour showed the same acceptability by panellists as the semolina pasta. These levels of supplementation were selected for further studies. The cooked alfa-galactoside-free lupin/semolina pastas showed higher amounts of protein, dietary fibre, calcium, phosphorus, magnesium, zinc and antioxidant capacity than control pasta and a reasonable level of vitamin B1, vitamin B2 and vitamin E. Biological assessment of cooked pastas indicated that the true protein digestibility did not change after the fortification of semolina but protein efficiency ratio increased sharply in the pasta supplemented with -galactoside-free lupin flours (2.07 and 1.92 for Emir and Troll lupin varieties, respectively) in comparison with the control pasta (1.11). It is concluded that the alfa-galactoside-free lupin flours are an adequate ingredient to improve the nutritional quality of pasta products without adding flatulent oligosaccharides.