| |
Product Review: Lutein & Zeaxanthin |
|
|
 |
How Products were Selected:
Products were selected to represent those commonly sold and/or available nationally in the U.S. 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:
Products were tested for their claimed amount of lutein and zeaxanthin. Analysis for lutein and zeaxanthin was performed using an HPLC method in an independent laboratory. Products not having passing levels of lutein and zeaxanthin were then re-tested in a second independent laboratory using a similar HPLC method.
Disintegration of non-chewable, non-capsule, non-enteric coated and non-time-release formulations were analyzed utilizing USP (United States Pharmacopeia) <2040> recommendations entitled "Disintegration and Dissolution of Nutritional Supplements."
Analyses were conducted in independent laboratories to which the brand identities of the products were not disclosed. Any product not passing an initial analysis was retested in a second independent laboratory on at least one of the criteria on which it did not initially pass.
Passing Score: *
To pass testing, a product must meet the following criteria:
- Contain at least 100% of its labeled amount of lutein and zeaxanthin and no more than 150% of this amount.
- Meet recommended USP parameters for disintegration for vitamin supplements (excluding capsule, enteric coated, chewable and time-release products).
- Meet all FDA labeling requirements.
A product passed if it passed each applicable criterion in any one of the analyses.
* 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 if it considers such product to present a safety risk or to provide misleading or inaccurate label information.
Back to review
|
|
|
|
|
