http://www.newsdesk.umd.edu/sociss/release.cfm?ArticleID=1470
What is HFCS?
In sorting out the impact of high fructose corn syrup on obesity, the study says, it's important to understand the differences in sweeteners - what is actually HFCS and what is not?
According to Maureen Storey, Ph.D., CFNAP director and a member of the study team, there are three types of HFCS products (HFCS-55, HFCS-42, and HFCS-90), but only HFCS-55 and HFCS-42 are commonly used as sweeteners. HFCS-90 is mainly used in the production of HFCS-55, but is seldom directly added to foods and beverages. The composition of HFCS-55 (55% fructose and 42% glucose) is very similar to that of sucrose (50% fructose and 50% glucose). HFCS-42 (42% fructose and 53% glucose) actually contains less fructose than sucrose does.
HFCS-55 is used mainly in beverages, such as carbonated and non-carbonated soft drinks; HFCS-42 is used to sweeten a wide variety of foods.