The process converting these things to glucose, and some of the other ingredients in this food, result in all sorts of chemicals being released into your body.

The process converting these things to glucose, and some of the other ingredients in this food, result in all sorts of chemicals being released into your body. (not bad -- vitamins are chemicals... etc). These in turn affect how the body operates. Depending on how the body is operating, various other chemicals, such as hormones are released -- creating various brain reactions -- and since the brain is affected, presumably this means the brain is affected. (Yes it's a tautology -- done for effect). This doesn't even include the fact that some things in food directly affect the brain, such as caffeine.