For labelling purposes, most sugars are considered to provide 4 kcal/g. However, subtle variations in chemical structure between different sugar compounds influence the way in which they are digested, absorbed and metabolised. These variations are evident in the glycaemic index (GI) of individual sweet-tasting mono- and di-saccharides (Table 1) (Foster-Powell, Holt, & Brand-Miller, 2002). The main health concerns surrounding sugars and sugar-rich products are their cariogenic properties, and that their excessive intake, from sources that provide little other nutritional value, may be contributing to a positive energy balance. It is important to note that for individuals affected by hereditary fructose intolerance (i.e., a rare metabolic disorder resulting from deficiency of hepatic fructose-1-phosphate aldolase activity), the consumption of fructose and sucrose has severe detrimental effects on health and must be completely avoided