I have known this for 20 years when I quit any food with it in it. I was supposedly eating healthy back then. It was in my yogurt, granola bars, cereal etc.
I had a LOT of health problems. They all went away. Joint pain, arthritis, gingivitis, asthma, etc
I switched to the same diet with real sugar instead of HFCS. The health issues were gone in a few WEEKS! over 18 months I lost 45 lbs. Even with cane sugar.
Later I lost more weight when I went Mediterranean diet. That was about 18 years ago. I am now 70, healthy, and on not a single medication.