Abstract
Yogurt becomes a functional food upon incorporating probiotics-live microorganisms which when adequately administered confer health benefits. Prebiotics are fermentable fibres that nourish beneficial gastrointestinal microflora enhance the functionality of probiotics. This research aimed to improve the acceptability and functionality of probiotic yogurt produced in Mwanza, Tanzania by incorporating probiotic food ingredients. The probiotic culture Lactobacillus rhamnosus GR-1 and standard yogurt cultures Lactobacillus delbrueckii bulgaricus and Steptococcus thermophilus were used to manufacture yogurt, then locally available prebiotic food ingredients containing fructooligosaccha- ride/inulin were incorporated. A nine-point facial hedonic scale was used to evaluate five yogurt samples. A mean score between one and three indicated that the sample product was well accepted. Probiotic yogurt containing onions, garlic and sweet potato received a score of 1.6 ± 0.84 (p 0.90), and plantains, 5.3 ± 2.56 (p > 0.90) were not well accepted. Sweet, mildly flavored prebiotic ingredients were most successfully incorpo- rated into probiotic yogurt in Mwanza.
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