This is interesting from Dr Crista this morning. She doesn't use humic or fulvic acid to bind mycotoxins as she thinks it is ineffective. She uses psyllium, flaxseed instead as bile binders.
Granted, there are some studies about humic and fulvic acids binding mycotoxins. But that’s direct binding of mycotoxins in food.
In a water-damaged building exposure, mycotoxins are packaged first in bile before they’re sent to the intestines. So our focus is to bind bile. I find insoluble fiber to do a much better job at that, things like psyllium husk, ground flax seeds, and bran.
Read her full post here where she outlines when she would use humic/fulvic.