As with many things: the poison is in the dose.
Trying to drink 1 or 2 gallons of water will kill you from water poisining.
With boron compounds that safe dose is many times lower, but using it will definitely hurt Big Pharma's bottom line.
Many people have a boron deficiency without even knowing it, and it's the cause of a very large number of health problems, ranging from arthritis to cancer.
Boron pills can still be obtained where i live (even if i have to get them from another country), but prolonged use can become expensive, also because of shipping costs.
Plus they always contain fillers, which can bring their own problems.
The ones i used however did definitely raise my free testosterone levels within 2 weeks.
Borax is practically unobtainable here, because it was banned by our unelected EU bureaucrats for sale to private consumers in 2010.
I still keep my eyes open for a small amount to experiment with, curious as i became by reports from a retired chemistry doctor i know, who cured himself from arthritis with very low doses of diluted borax and documented his entire journey.
I did however manage to obtain 5 grams of pharmaceutical grade boric acid powder, and i'm currently experimenting with that.
Dissolved 2,5 grams of the boric acid powder in 1 liter of filtered water, and currently take 1 teaspoon of this mixture daily.
If in the coming 3-4 weeks i have no complaints arise, i will probably go to 2 teaspoons, one in the morning and one in the evening.