Honey and all natural sugars do nothing to cause any agitation in my family. I have been on a honey kick lately, and have no headache problems.
HFCS is a chemical man-made mixture that chemist university professors have personally warned us about, and told us not to consume. It is known to cause brain damage and kidney damage. Since it is a chemical mixture that is man-made and not natural, our bodies have trouble recognizing it for sugar.
High Fructose Corn Syrup: Some Scary Facts to Consider Before You Gulp Down Soda
http://www.freerepublic.com/focus/f-chat/3002048/posts
5 Reasons High Fructose Corn Syrup Will Kill You
http://www.freerepublic.com/focus/f-news/2723427/posts
Also, to those who wish to avoid HFCS. They have been changing the name of it to hide it in ingredients. ex: corn sugar.
bump for later
Your body can't recognize fructose and glucose? Did you bump your head?
Good grief, what a load that statement is. To accept such nonsense you'd have to believe that fructose and glucose are chemically different depending where they are found. That's total BS. Fructose is fructose and glucose is glucose regardless where it comes from. Your body doesn't know the difference nor does it care one whit about the source.
You are incredibly confused and it's because your sources for information are junk. A decent book in basic human nutrition would help you immensely.