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Question:
Do companies have to test supplements before they are sold?

Answer:
Under the law, manufacturers of vitamin, mineral, and other supplement are required to test the identity and quality of ingredients that go into their products, but some don't. The FDA issues Warning Letters to companies caught not complying. These letters get posted in the Warnings section on ConsumerLab.com.


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This CL Answer initially posted on 3/22/2012. Last updated 8/8/2017.

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  • If you make a statement of fact, such as whether a type of treatment does or does not work, state your basis -- such as personal experience or a published study.
  • If you make a positive or negative comment about a product, note whether or not you have a financial interest in the product or in a competing product.
  • Please be respectful in your tone.
  • Please do not submit any type of HTML markup or scripting as it will not be accepted.
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