Abstract Fortified soymilk extracted from 12hrs tap water steeped and 72hrs sprouted TGX 923-2E soybean variety was optimized using central composite design (CCD). Box-Wilson (1951) experimental design matrix was used for the fortification which comprised three variable factors (K=3) namely ferric ammonium citrate (Fe), calcium carbonate (CaCO3) and vitamin C (VC). Data on each run were statistically regressed with Minitab (version 11.21) computer software while response surface plots were generated with Matlab (version R2007b) computer software. Regression models showed that the three combinations of the experimental variables had cross product effects on growth performance with maximum growth performance from fortificant combinations 5, 150, 24 for iron, calcium carbonate and vitamin C respectively.
Keywords Growth performance, micronutrient, complementary feeding, fortified soymilk, and response surface methodology.