Since 1979, Allergy Research Group has used only the purest raw materials available and has implemented strict quality control procedures in every stage of production, including inspection of raw materials, manufacturing, packaging and storing. For many years, we have used the same manufacturers to produce our capsules and tablets to ensure consistency. In our facility in Alameda, California, we bottle, label and ship our finished products. Allergy Research Group is currently licensed by the California Department of Health Services, Food and Drug Branch.