HFCS reacts badly with the majority of the population, inducing adiposis. So does MSG. Don't forget about the pesticides you chow down on with every meal, or the chloride in your water, or the phthalates in your soda, or the BPA in your nalgene, or...
The US is terrible for substance safety. Dire. Awful. Hell, on the note of colouring, you still use bloody anthracine red, which has been banned for decades in the rest of the planet, as its carcinogenic.