I think this is a pretty well known fact, but think about it...
I know that I start feeling bad if I'm not around good 'ol wood for a while...the smell of each variety, and aroma that is created by cutting open the fiber.
I need to work some wood today...I need more fiber, I think I'm getting too many minerals lately, mo' fiber is a good 'thang! (gotta have SOME minerals though )
Like everything in life, even wood needs something to balance with. Fiber and Mineral, it makes sense to me. After all, we couldn't work wood very well by using wood itself!