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Product Review: Melatonin Supplements |
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HOW PRODUCTS WERE EVALUATED:
How Products Were Selected:
Products selected represent those commonly sold and/or available nationally in the North America. ConsumerLab.com purchased products on the open market through retail stores, on-line retailers, catalogues, or multi-level marketing companies. Products were not accepted directly from manufacturers.
Testing Method:
Analysis for melatonin and lead was performed using an HPLC method and ICP-MS (Inductively Coupled Plasma-Mass Spectroscopy) in an independent laboratory. Products not having passing levels of melatonin or lead were then re-tested in a second independent laboratory using comparable HPLC and ICP-MS methods.
Disintegration of non-chewable, non-capsule and non-time release formulations was analyzed utilizing USP (United States Pharmacopeia) 2040 recommendations entitled "Disintegration and Dissolution of Nutritional Supplements." Any product that did not pass the disintegration testing was sent to another independent laboratory in which the same test was repeated.
The identities of the products were not disclosed to the laboratories performing the testing.
Passing Score: *
To pass testing, a product must meet the following criteria:
- Contain a minimum of 100% of its labeled amount of melatonin and not exceed 135% of this amount.
- Meet recommended USP parameters for disintegration for vitamin supplements (excluding capsule, enteric coated, chewable and time-release products).
- Contain less than 0.5 micrograms of lead per daily serving.
- Meet FDA labeling requirements.
A "Pass" was based on meeting the above criteria in either the first or second rounds of testing.
* Passing scores allow for specific margins of technical error associated with each analysis. ConsumerLab.com reserves the right to disqualify a product at any time from passing its testing if it considers such product to present a safety risk or to provide misleading or inaccurate information in its labeling.
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