Actually, there is some sense to it. Gluten and Milk Casein (particularly A1) when broken down both have leftover amino acids that join together to make peptides, and these particular peptides are a similar chemical makeup to heroin/morphine. In a normal working gut, these should be excreted out, but in a malfunctioning gut, usually effected by yeast overgrowth, they will slip through micro holes and into the bloodstream. The same yeast overgrowth also creates sluggish bowels, where the peptides can be absorbed int the bloodstream because they are sitting in there so long. Likewise, the digestive enzymes in a child that is intolerant/allergic to these substances will not break them down as effectively either, having the same result as yeast overgrowth. As these peptides are similar to each other, logically, if a person has an issue with one, they are also highly likely to have issues with the other. It might appear that by removing one, it meant they didn't have issues with the other, but this could be more a case of having lessened the load rather than them not actually having an issue with it.