After a two-week study, adults who consumed high fructose corn syrup as 25 percent of their calories showed troubling changes. They had elevated bad cholesterol and triglycerides.
This adds to research that excess sugar consumption may in fact increase one's risk for heart disease.
Currently the 2010 dietary guidelines say that getting 25 percent of your calories from sugar is the accepted upper limit. Researchers say that upper limit of 25 percent may need to be reevaluated.