I pretty much read this whole link and then did a search on Walter Last who now resides in Queensland. This is a strong thorough ton of information on boron, borax, boric acid...the whole history from Walter Last. And Dr. Neeham's (sp) work with borax/boron and how it's been "silenced".
http://www.health-science-spirit.com/borax.htm
I have other health friends on alternative healing groups who take borax and or boron daily and they have good benefits from it.
One just will decide who they want to believe to help with "cures" or better management.