I am unsure what an MRI would show and this might be unnecessary (and expensive). I would instead consider getting your liver enzymes tested to see if there levels are elevated. This would indicate that toxins are stressing your liver. An MRI won’t be able to reveal toxins in the body.
If you can sweat out the toxins like I stated earlier, this is the best way to defeat die-off.
Additionally, there are some brain supplements out there that can increase mental function. The only problem is that these are fatty acids which are also antifungal (causes die-off). Examples include SF722, E3AFA, and super neurogen. I also know about one that helps you sleep and it also boosts your brain function and memory…its called PS-100 (Phosphatidylserine) and is a brain chemical. If you get this supplement, be sure to get the highest quality one because you don’t want to give yourself crap.