Cosamin®DS is tested and certified by NSF International. NSF certification ensures that dietary supplements do not contain unacceptable levels of contaminants. NSF developed the only American National Standard for dietary supplements (NSF/ANSI 173) with participation from a balanced stakeholder group including the U.S. Food and Drug Administration (FDA), National Institutes of Health (NIH), other federal agencies, state regulatory agencies, manufacturers, retailers, industry trade associations and consumer groups. NSF has worked for over a decade with sports organizations, anti-doping agencies, and supplement manufacturers to evaluate and test these products and to help ensure their quality and safety.