There is no question that molds produce toxins (just try eating a poisonous mushroom) and that these toxins can migrate freely in the environment, but it can be very difficult to prove that mold toxins are causing illness in a particular person.
Detoxification requires a good deal of energy. Unfortunately, the accumulation of toxins can damage the mitochondria that provide that energy for our cells, and this can initiate a downward cycle, so many individuals need assistance to support detoxification.