Mvm (Sinop) on 12/25/2017:

Taking a serious risk, I took 1/4 teaspoon of borax with a glass of water. The next day, I got strong Herx reactions primarily including stomach and gut pain, nausea, and slight pains or pressures in various regions of my head.

I noticed that a teaspoon of MSM powder (which I've been using for a week now) with a glass of water and orange juice alleviated the reactions.