High Fructose Corn Syrup is not always 55% fructose. HFCS can vary greatly in that ratio according to [this USC study](http://www.ncbi.nlm.nih.gov/pubmed/209485

High Fructose Corn Syrup is not always 55% fructose. HFCS can vary greatly in that ratio according to [this USC study](http://www.ncbi.nlm.nih.gov/pubmed/20948525 http://www.ncbi.nlm.nih.gov/pubmed/20948525) that analyzed the fructose ratio of a variety of HFCS only sweetened soft drinks. They found the actual ratio varied from 47-65%, with the mean amount being 59%, and the amount in several major brands was 65%. The fructose ratio in HFCS is not regulated or reported, so you could be drinking anything. With a mean of 59% a 9% difference to table sugar is a big difference, and many popular brands have a 15% difference. According to the study, the difference between HFCS and sugar is not a myth. The other advantage that sugar has over HFCS has nothing to do with the chemical composition. It's more expensive.