Abstract
Worldwide there is great interest in producing low lactose milk and drinks, such as soy beverages, suitable for consumption by lactose-intolerant people. These products have different carbohydrate compositions, which affect quality indicators derived from Maillard reaction (furosine and 5-hydroxyl-methyl furfural, HMF). In this study, quality parameters have been determined in 11 commercial samples (8 lactose-hydrolyzed milks and 3 soy beverages). Presence of β-galactooligosaccharides in milks (22.2-458.1mg/100mL) correlating roughly with the remaining lactose content (1.9-357.7mg/100mL). Soy beverages contained α-galactosides in concentrations of 30-75mg/100mL. HMF and furosine were detected in all milk samples. In addition, powdered milks subjected to controlled storage (40 °C, aw 0.44) showed a furosine increase up to 88%. In conclusion, a great composition diversity was observed in the different products, probably favored by the lack of regulation and underline the importance of controlling processing and storage conditions to preserve product quality.
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