Soy Protein is an Efficacious Alternative to Whey Protein Sorghum-Soy Fortified Blended Foods in Rats

Erin J Ward, Hafiz A R Suleria, Michael Joseph, Edgar Chambers, Sajid Alavi, Brian L Lindshield
2020 Current Developments in Nutrition  
Background Previously we found that extruded corn-soy blend (CSB) and sorghum-soy blend (SSB) fortified blended foods (FBFs) containing whey protein concentrate (WPC) were equally nutritious food aid products. WPC provides high-quality protein, however, it is the most expensive ingredient in these FBFs. Objective The primary objective of this study was to determine if soy protein may serve as an alternative to WPC and secondary was to evaluate different sucrose levels in the FBFs. Methods Nine
more » ... FBFs. Methods Nine extruded FBFs were formulated; one CSB and one SSB, both containing 9.5% WPC and 15% sucrose, served as comparison FBFs. Three additional CSB and four SSB FBFs were formulated containing no WPC, but with increased soy flour to meet protein requirements and varying sucrose concentrations. The sucrose content ranged from 0–10% for the CSBs and 0–15% for the SSBs. Male, weanling Sprague Dawley rats were individually housed and divided into ten diet groups (n = 9–10) which consumed either AIN-93 G or a dry FBF for 28 days. At study conclusion, blood, livers, and body composition data were collected. Results were analyzed using one-way ANOVA with Tukey's test. Results Outcomes were not significantly different among the SSB groups, with the exception of significantly higher protein efficiency for the WPC-containing group. Among the CSB groups, caloric and protein efficiencies were significantly higher for the WPC-containing CSB group. There were no significant differences in hemoglobin or hepatic iron concentrations between FBF groups, but hepatic iron concentrations were significantly higher in all FBF groups compared to the AIN-93 G group. Groups consuming diets with ≤ 10% sucrose had significantly higher bone mineral density compared to groups with 15% sucrose. Conclusions These results suggest that extruded SSB, but not necessarily CSB FBFs, with soy protein and 5- 10% added sucrose are efficacious and cost-effective alternatives to WPC-containing FBFs.
doi:10.1093/cdn/nzaa115 fatcat:rbbmdjtrrjhudgqhy2nqzncqcq