Many unpatentable modalities in the realm of complementary and alternative medicine do not inspire huge and costly trials. We need such trials to know for sure what does and doesn't work. In the absence of them, we need to avoid a rush to judgment.
Those vets with this set of health problems -- often referred to as "Gulf War Illness" -- have not been improving since the end of their service. And their symptoms picture is shared by many others who never served in the military.