This is probably the best post on boron (by Travis) .
I agree with the hypothesis that arthritis might be of fungal origin and that borons main effect is anti-fungal. Not only that it also protects against fungal toxins like aflatoxin (https://www.sciencedirect.com/science/article/abs/pii/S0946672X23000032)
It's wild that Travis took gram -amounts of boron. It is inherently non toxic , apparently less toxic than salt.
https://lowtoxinforum.com/threads/nothing-boring-about-boron.22805/post-451585