Posted by Miriam (Nyc, Ny / Usa) on 03/28/2012
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A quick Google check reveals that a teaspoon of borax is equivalent to 5 ml. At 1/4 tsp a day for men, that means ingestion of only 1.25 ml per day. For women, the recommended usage is half that amount.
This is in the order of 1% of the theoretical toxic dose - hardly threatening.
Colleen, if you are fact checking, then you should check all relevant facts.