Because of the tastiness of sugar, it is easy to consume more than an adequate amount. There are many research reports that excess sugar intake contributes to obesity, diabetes etc. Japan has been the most successful in preventing a high prevalence of obesity. The production of isomerized sugars such as high fructose corn syrup (HFCS) has been increasing in recent years worldwide. The isomerized sugars are produced from starches in factories
therefore their production is stable and their price can be kept low. In addition, their liquid form makes it easier to add them to beverages. Currently, many research reports that over-intake of sugars/sweeteners made from HFCS (mainly in beverages) are a cause of disease, in particular obesity, have attracted considerable attention, particularly in the US. Continuing economic development in Southeast Asian countries has improved their standard of living compared to the past. This situation has made it easier than before for people to consume more sugars in their daily life.