remediation is a nice new word, but i fear it is based a lot on the same principles as old fashioned cough remedies. It helps, it doesn't hurt, but no-one can say to what degree and whether it was a fair service for the price.
Firms that take mold out of buildings want to stay in business, so they have to be sure that their own employees don't start a class action lawsuit against them; that is why the employees have to be protected more than anyone else.
Millions or billions of types of molds are out there, so it'll take more manyears than we have to study them in this century. Most molds grow on the broken cells at the edge of organic matter, like where wood has been cut. So solid wood when damp rots away very slowly, when compared to damp plywood, OSB, particle board, luan or paper. Those are just some organic things that have cellulose in them. Molds also eat other organic things, like paint, soap and dust.
Molds all excrete toxins. Just like higher animals do, And lower ones too. Excreting what they might call byproducts left over after they eat. Molds excretions are liquid or gas, known as mycotoxins. (Myco- is the greek origin root word for anything in the mushroom family.) A few mycotoxins are lethal, some are only toxic, and most have a not yet determined impact on human health. This explains also why it is safe practice for employees who touch new molds every day or every week to have those HazMat suits, because their immune systems may be already going haywire from a previous stress.
Allergies are by definition a body's reaction to a stressor that another body's immune system does not consider as life threatening or worth going into high gear for. Sine you cannot reason with your immune system, you have to take it seriously when it sends you those signals that it has been working overtime and draining you of most of your vital energy. If you get allergies, it is not a bad thing, but you have to isolate what those stressors are, and take action to reduce exposure to those stressors.
Hope this helps.