It is required by the US law to have this statement on every product - except drugs - and Adya Clarity is not a drug. Adya Clarity is a Natural Health Product licensed by Health Canada since 2011 and is marketed as a water purification product in US.
In other words, if this statement is not listed on a non-drug product, it is violating the law and needs to be taken off the shelf. For more information on the reasoning of having this disclaimer, you can visit this FDA link.
http://www.fda.gov/food/dietarysupplements/qadietarysupplements/#wording
Adya Clarity is a registered Natural Health Product licensed by Health Canada since 2011. You can search the database with its NPN (Natural Health Number): 80028256.
https://health-products.canada.ca/lnhpd-bdpsnh/info.do?licence=80028256
Adya Clarity is clinically proven to be safe and effective in removing heavy metals inside the body. The report is available here:
http://waterliberty.com/pdfs/Heavy_Metal_30-day_study.pdf