[geeks] caffeine - differences based on source

[james]

> Seems when I drink tea, the caffeine stays in the system
> longer and the effects are distributed over a longer
> length of time, than when I drink a soft drink that has
> caffeine.
> 
> Does that make any sense to anyone?  Anyone observed any
> differences?

I don't drink tea, but I do drink coffee. 2 12oz Coke cans =
roughly 1 cup of coffee's caffeine content, yet coffee will
have much *more* effect on me and it lasts longer.

I've noticed this for years. No clue what is going on.