Because it takes our bodies a long time to digest that fiber, the apple's sugar is slowly released into our blood stream, giving us a sustained source of vitality. Those who've retained the flexibility to digest dairy products effectively in adulthood are primarily of northern European ancestry. In much of the world’s inhabitants, lactase exercise declines during childhood and adolescence, which leads to an inability to digest lactose adequately. Monosaccharides of nutritional importance are glucose, fructose, and galactose