A novel food enriched in protein and fiber derived from lupin kernel flour significantly influences energy intake acutely.

Objective: To determine the effect of adding chickpea flour or extruded chickpea flour to white bread on palatability and postprandial glycaemia, insulinaemia and satiety. Design: A randomised, single-blind, cross-over study of four 50 g available carbohydrate breakfasts. Setting: School of Exercise and Nutrition Sciences, Deakin University. Subjects: In all, 12 healthy subjects were recruited through posted notices. Totally, 11 (nine male, two female) completed the study (mean7s.e.m.; age 3272 y; body mass index, 24.770.8 kg/m 2 ). Intervention: After overnight fasting, subjects consumed a control (white) bread (WB) breakfast twice, a chickpea bread (CHB) breakfast once and an extruded chickpea bread (EXB) breakfast once. Palatability and postprandial blood glucose, insulin and satiety responses were determined. Following this, food intakes from an ad libitum buffet and for the remainder of the day were assessed. Results: A trend towards a lower incremental area under the curve (IAUC) of glucose for the CHB breakfast compared to the WB breakfast was observed (P ¼ 0.087). The IAUC of insulin and insulinaemic index (II) of the CHB breakfast were higher (Po0.05) than for the WB breakfast. No differences in glycaemic index (GI), satiety response, food intake or palatability were observed. Conclusions: CHB and EXB demonstrated acceptable palatability. CHB demonstrated some hypoglycaemic effect compared to WB, but neither CHB nor EXB demonstrated effects on satiety or food intake. The hyperinsulinaemic effect of CHB observed in this study requires further investigation.

Objective: To examine the effect of a diet containing a novel legume food ingredient, Australian sweet lupin (Lupinus angustifolius) kernel fibre (LKFibre), compared to a control diet without the addition of LKFibre, on serum lipids in men. Design: Randomized crossover dietary intervention study. Setting: Melbourne, Australia -Free-living men. Subjects: A total of 38 healthy males between the ages of 24 and 64 y completed the intervention. Intervention: Subjects consumed an LKFibre and a control diet for 1 month each. Both diets had the same background menus with seven additional experimental foods that either contained LKFibre or did not. Depending on energy intake, the LKFibre diet was designed to contain an additional 17 to 30 g/day fibre beyond that of the control diet. Results: Compared to the control diet, the LKFibre diet reduced total cholesterol (TC) (mean7s.e.m.; 4.571.7%; P ¼ 0.001), low-density lipoprotein cholesterol (LDL-C) (5.472.2%; P ¼ 0.001), TC: high-density lipoprotein cholesterol (HDL-C) (3.072.0%; P ¼ 0.006) and LDL-C:HDL-C (3.872.6%; P ¼ 0.003). No effects on HDL-C, triacylglycerols, glucose or insulin were observed. Conclusions: Addition of LKFibre to the diet provided favourable changes to some serum lipid measures in men, which, combined with its high palatability, suggest this novel ingredient may be useful in the dietary reduction of coronary heart disease risk.

Consumption of some dietary fibres may benefit bowel health; however, the effect of Australian sweet lupin (Lupinus angustifolius) kernel fibre (LKFibre) is unknown. The present study examined the effect of a high-fibre diet containing LKFibre on bowel function and faecal putative risk factors for colon cancer compared to a control diet without LKFibre. Thirty-eight free-living, healthy men consumed an LKFibre and a control diet for 1 month each in a single-blind, randomized, crossover study. Depending on subject energy intake, the LKFibre diet was designed to provide 17-30 g/d fibre (in experimental foods) above that of the control diet. Bowel function self-perception, frequency of defecation, transit time, faecal output, pH and moisture, faecal levels of SCFA and ammonia, and faecal bacterial b-glucuronidase activity were assessed. In comparison to the control diet, the LKFibre diet increased frequency of defecation by 0·13 events/d (P¼0·047), increased faecal output by 21 % (P¼0·020) and increased faecal moisture content by 1·6 % units (P¼ 0·027), whilst decreasing transit time by 17 % (P¼0·012) and decreasing faecal pH by 0·26 units (P, 0·001). Faecal butyrate concentration was increased by 16 % (P ¼ 0·006), butyrate output was increased by 40 % (P¼ 0·002) and b-glucuronidase activity was lowered by 1·4 mmol/h per g wet faeces compared to the control diet (P,0·001). Addition of LKFibre to the diet incorporated into food products improved some markers of healthy bowel function and colon cancer risk in men.

Foods containing Australian sweet lupin (Lupinus angustifolius) flour (ASLF) were assessed by consumer panelists (n = 54) in comparison to wheat flour (control) and defatted soy flour (DFSF) products. All ASLF products were rated in the acceptable half of the evaluation scale. General acceptability of ASLF chocolate chip cookies and breakfast bars was rated similarly to the control and DFSF variants (P > 0.05). ASLF pasta was rated lower than control but higher than DFSF pasta (P < 0.05), whereas ASLF addition reduced the general acceptability of muffins and bread (P < 0.05) compared with the other variants. Some ASLF products appeared palatable whereas ASLF incorporation rate in others requires reduction.