HFCS is just about the worst food ingredient out there that is present in foods in amounts larger than a couple of milligrams. Maybe trans-fats are worse, but those have been largely phased out. In 2009, sampled foods with HFCS had detectable levels of mercury, though corn refiners claim this is fixed and due to an outdated refining process that used mercury.<p><a href="https://www.webmd.com/food-recipes/news/20090127/mercury-in-high-fructose-corn-syrup" rel="nofollow">https://www.webmd.com/food-recipes/news/20090127/mercury-in-...</a><p>That's on top of all the other negative health effects like diabetes, metabolic syndrome, etc.