Endomet Supplements are specifically designed to be used with hair analysis testing. They have been used for over 30 years and only Endomet supplements predictably change biochemistry in ways that other brands fall short. Don't take chances with using other brands of supplements with your Nutritional Balancing program. After all you are working so hard to detoxify and heal athat you wouldn't want to unknowingly ingest more toxins. Rest assured that all of Endomet Suppplement ingredients are laboratory tested and are manufactured in a FDA licensed facility.