>>>>>>>>"Borax is a form of Boron, and it may react to form Boric Acid!"<<<<<<<<
"Elemental boron is nontoxic and common boron compounds such as borates and boric acid have low toxicity (approximately similar to table salt with the lethal dose being 2 to 3 grams per kg) and therefore do not require special precautions while handling.
Boron occurs in all foods produced by plants.
The presence of boric acid or its salts has been noted in sea-water, whilst it is also said to exist in plants and especially in almost all fruits."
I think we need relative perspective here before saying that boron is toxic.