About caffeine: for those who are sensitive to it, caffeine causes (over a long period of use) damage to the frontal lobes of the brain just above and behind the eyes. For the best information on the subject of caffeine, please read the following article on the internet by Ms. Ruth Whalen (whom I've talked to via internet and she is one who is really in the know about caffeine).

http://www.Doctoryourself.com (It should open by just clicking the site quoted
here if you have Google as your search engine. Otherwise, write down the URL
and switch to Google and give the exact URL given here. That will bring you
to Doctor Yourself.)

When the website pops up, go down the left hand side on the index and look down
until you see an article called "Caffeine Allergy" by Ruth Whalen. It's an astounding
account of her experience as a lab technician who has experience in examination of
brain tissue and the effects of caffeine sensitivity on the brain.

Dr. David Williams in his new book Wheat Belly implicates wheat in brain disease of
some types: dementia and others that I don't recall immediately. At any rate, his
work is worth your reading. I've read it and given up the use of grains as a result.
I simply substitute nuts, seeds, green vegetables for the amino acids missing by not
using grains.

Dr. Williams, as I posted earlier, has said that it is nonsense to think that we cannot
live without wheat, rye, or barley (the big three containing gluten). We can very
easily, and I'm working on it myself and losing weight, too. Grains are a big, big
weight gain cause.