From the toxicity section (https://en.wikipedia.org/wiki/Borax#Toxicity) it seems like the concern is most about ingesting borax in large quantities or breathing in the dust. And also being cautious on potential health affects:
Since people are already exposed to boric acid naturally through their diets and water, Health Canada advised that exposure from other sources should be reduced as much as possible, especially for children and pregnant women. The concern is not with any one product, but rather multiple exposures from a variety of sources.
The article seems to be talking about two potentially unrelated effects - up-regulation of gluconeogenesis in the liver and BCAT1. The gluconeogenesis makes sense in the presence of glucose-hungry cells, the body would start making its own to stabilize blood sugar. I wonder what the signal mechanism is for the BCAT1 up-regulation?
Is there a text transcript feature for users who may want to search through the communications? I'm curious how well those speech-to-text tools work for the audio feeds.