“…Different types of lactose-derivatives, such as galacto-oligosaccharide, lactosucrose, tagatose, lactulose, lactitol, lactobionic acid, and gluconic acid are produced through different enzymatic reactions (hydrolysis, transgalactosylation, isomerization, fructosyl-transfer, reduction, and oxidation), and microbial fermentation processes. They fulfill all criteria to become a member in the prebiotics family [7,8]. Lactose-based prebiotics are confirmed as ‘safe’ by the Food and Drug Administration Federal agency [9] and have unique biochemical importance [7,8,10].…”