uses JavaScript to provide the best possible experience for our content, but your browser has it disabled. Learn how to enable it here.


Posted June 13, 2014

FDA Warns "Chelation" Supplements Are Unsafe

On June 12, 2014, the FDA warned consumers not to buy or use "heavy metal chelation" supplements Captomer or Captomer-25 (by Thorne Research), because they contain DMSA (meso-2, 3-dimercaptosuccinic acid).

DMSA is an active ingredient in a prescription product for the treatment of lead poisoning in children.

The FDA further warned that using chelation agents is associated with significant risks and should be performed under medical supervision. The agency advised consumers to avoid all over the counter products promoted for chelation or detoxification.

Thorne Research has agreed to voluntarily recall Captomer or Captomer-25.

Consumers who have purchased this supplement should discontinue use immediately and contact their healthcare provider if they have experienced any adverse side effects. Consumers and healthcare providers are also encouraged to report any adverse reactions to the FDA's MedWatch Adverse Event Reporting Program. has not tested Captomer or Captomer-25, but has tested other Thorne Research products, which you can find results for here.

To read the FDA's warning, use the link below.