Hey, so we have done no research for under the age of 12. We do know practitioners use the products in protocols as they work with the parents and children. They normally focus with half the dosage, but we recommend speaking with your healthcare practitioner who will be best to advise and monitor.
Toxaprevent will mop up and bind the mould and the histamine in the body reducing the symptoms and histamine reaction. Mould as you mentioned triggers the immune system which in turn leads to a release of histamine and the symptoms he is feeling.