I would like to ask those of you who know more about this than I do a couple
of questions about the safety of using old honey.  I had always heard that
honey "lasts forever" as long as you keep moisture out of it, and will still be
good to eat.  I had also heard that carmelized honey will kill bees.  Another
thing I had heard is that there is a chemical change that takes place in honey
as it ages (and I forget the name of the chemical that is produced) and that
it is not good for bees.  Of course you always have the potential of spreading
diseases through feeding honey from an unknown source to bees.

Specifically my questions are these:
1)  If I have some old dark honey (say 25 years old) that was dark to begin
with but is now darker, that was stored in a sealed container and kept from
moisture, but was stored in a climate that has hot summers and it was not kept
in an air conditioned environment, how safe is it for a human (me) to eat?
2)  If it is at all unsafe for human consumption, what is the component
(chemical in it) that causes the problems, and what problems does it cause?

Basically, how safe is it to eat?

Thanks for your help.  Sincerely,  Layne Westover, College Station, Texas, USA