Galactose relative sweetness

The hypothesis could also account for differences in the relative sweetness of sugars by simple consideration of the way in which configurational differences might affect hydrogen bonding. The sweetness of D-galactose... 

Lactose (C12H22O11) is a disaccharide of dextrose and galactose and is present in milk (Figure 3.5). Lactose is substantially less sweet than sucrose. It also has a relatively low solubility, as a result of which it can crystallize out of ice cream as a monohydrate i.e. for each lactose molecule there is also a water molecule in the crystal). The crystals... 

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