Apparently people think its highly under-rated.
Some of it may sound crazy, specially the chosen user testimonials but there's some decent info. Here's the copy and paste of the citations from bottom of the page before the link.
REFERENCES
(1) http://www.ncbi.nlm.nih.gov/pubmed/9638606
(2) http://www.whale.to/w/boron.html
(3) http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1566627/pdf/envhper00403-0084.pdf
(4) http://nah.sagepub.com/content/7/2/89.full.pdf
(5) http://www.arthritistrust.org/Articles/Boron and Arthritis.pdf
(6) http://www.ncbi.nlm.nih.gov/pubmed/172591209
(7) http://www.ithyroid.com/boron.htm
(8) http://www.ncbi.nlm.nih.gov/pubmed/21129941
(9) http://www.lef.org/magazine/mag2006/aug2006_aas_01.htm
(10) http://www.earthclinic.com/Remedies/borax.html
(11) http://jac.oxfordjournals.org/content/63/2/325.long
(12) http://www.ncbi.nlm.nih.gov/pubmed/21774671
(13) http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2873987/
(14) http://www.earthclinic.com/CURES/fluoride.html
(15) http://www.supergenial.ch/pi1/pd2.html
(16) http://www.health-science-spirit.com/ultimatecleanse.html
(17) [urlhttp:/www.sciencelab.com/msds.php?msdsId=9927593[/url
(18) http://www.hillbrothers.com/msds/pdf/n/borax-decahydrate.pdf
(19) http://www.atsdr.cdc.gov/toxprofiles/tp26-c2.pdf
(20) http://www.regulations.gov/#!documentDetail;D=EPA-HQ-OPP-2005-0062-0004
(21) http://en.wikipedia.org/wiki/Globally_Harmonized_System_of_Classification_and_Labelling_of_Chemicals
(22) http://echa.europa.eu/documents/10162/17230/supdoc_boric_acid_20100609_en.pdf
(23) http://www.inchem.org/documents/sids/sids/15630894.pdf
(24) http://www.sciencelab.com/msds.php?msdsId=9927258
As usual, do with this as you may.
protect tom mcdonald at all costs