High fructose corn syrup is made by processing regular corn syrup (mostly glucose) with enzymes to convert some of the glucose to fructose, making it sweeter. Corn is not naturally high in fructose.
https://www.ted.com/talks/david_deutsch_a_new_way_to_explain...
Science is looking at a problem. Stating it. Analysing it. (Setting up hypotheses, gathering data, coming up with clever ways to test those hypotheses, desigining experiments, conducting them, evaluating their results, and then iterating on this. While being vigilant at every step. Trying to falsify every step. If you can't falsify it, great, you have a useful model.)