Product Reviews
Selenium Supplements Review

How Products Were Evaluated

How Products Were Selected:
Products were selected to represent the majority of those commonly sold and/or available nationally in the United States. purchased products on the open market through retail stores, on-line retailers, and direct sales or multi-level marketing companies. Products were not accepted directly from manufacturers and were composed of multiple samples from a single lot having an expiration date later than the date of testing.

Testing Method:
Selenium products were tested for the amount of elemental selenium and potential contamination with lead. Tableted, non-chewable, non-capsule, non-enteric coated and non-time release formulated products were also evaluated for the ability to disintegrate. Disintegration of was performed using USP (United States Pharmacopeia) <2040> methodology. Initial disintegration testing was performed by

Samples of all products (with brand identities removed) were sent to an expert independent laboratory for the quantification of elemental selenium and elemental lead. Elemental analyses were performed using Inductively Coupled Plasma-Mass Spectroscopy (ICP-MS) methodology.

Products failing to meet any Passing Score were re-tested at a second independent laboratory using similar methods and instrumentation. may modify or use other appropriate test methods if necessary to test special product formulations.

Passing Score: *
To pass, a product must conform to all of the following criteria:
  1. Have a minimum of 100% of its labeled amount of elemental selenium and a maximum of 135% of this amount.
  2. Meet recommended USP parameters for disintegration for tableted vitamin-mineral supplements (excluding capsule, enteric coated, chewable and time-release products).
  3. Not exceed California Prop 65 levels for lead contamination in a recommended daily serving of a dietary supplement, i.e., contain less than 0.5 mcg of lead per daily serving with an additional allowance of 1.0 mcg for supplements containing 1,000 mg/day or more of elemental calcium and 0.5 mcg for supplements containing specific other minerals.** For supplements not marketed for use by children, provides an additional allowance of 0.5 mcg if containing 250 to 499 mg/day of elemental calcium, or 1.0 mcg if containing 500 to 999 mg/day of elemental calcium, and an allowance of 0.5 mcg if containing one whole herb (not extract) ingredient or 1.0 mcg for two or more whole herb ingredients. If a maximum recommended daily serving is not defined, a daily serving size will be determined and applied by CL.
  4. Meet FDA labeling requirements.

* Passing scores allow for specific margins of technical error associated with each analysis. 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 information in its labeling.

** Based on State of California's Prop 65 lead limit. California requires supplements exceeding this limit to bear a warning label regarding lead.

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