How Products were Selected:Selected products 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, or direct sales companies. Products were not accepted directly from manufacturers.
- Analysis for creatine including contaminants creatinine and dicyandiamide by High Performance Liquid Chromatography (HPLC).
- Analysis for branched chain amino acids valine, leucine and isoleucine by HPLC.
- Analyses for lead, arsenic, and cadmium using an Inductively Coupled Plasma-Mass Spectroscopy (ICP-MS) for products containing whole herbs and/or more than 250 mg of minerals per daily dose.
- Disintegration of tablets (excluding chewable, sublingual and timed-release formulations) utilizing United States Pharmacopeia (USP) <2040> methodology for the disintegration of dietary supplements.
ConsumerLab.com may modify or use other appropriate test methods if necessary to test special product formulations.
The identities of the products were not disclosed to the laboratories performing testing.
Passing Score:*To be "Approved" by ConsumerLab.com, a product must meet the following requirements:
- Contain not less than 99.9% of the claimed amount of creatine with the combined weights of creatinine and dicyandiamide found in the product not representing more than 0.1% of the measured amount of the creatine.
- Contain 100% and no more than 150% of claimed amount of individual and total free form, branched chain amino acids.
- Heavy Metals: Products containing whole herbs and/or more than 250 mg of minerals per daily dose must not exceed the following limits:
Lead: Not exceed the following limits for elemental lead:
- Products marketed for use by children may not exceed the State of California's Prop 65 limits for lead in dietary supplements of 0.5 mcg per recommended daily serving with an additional allowance of 0.8 mcg if the product contains more than 1,000 mg/day of calcium.
- Products with a single serving weight of less than 5 grams which are not marketed for use by children, may not exceed the 0.5 mcg per recommended daily serving (based on the state of California's Prop 65 limit for lead in dietary supplements, above which a warning is required regarding reproductive harm, birth defects, and cancer risks) with an additional allowance of 0.4 mcg if containing 250 to 999 mg/day of any combination of elemental calcium, potassium and magnesium, 0.8 mcg if containing 1000 mg/day of any combination of these minerals. An additional 0.5 mcg is provided if containing 250-999 mg/day of whole herb (not extract) ingredient or 1.0 mcg for products containing 1000 mg/day or more of whole herb (not extract). However, total lead allowance will not exceed 2 mcg per daily serving.
- Products with single serving weights of 5 grams or more which are not marketed for children may not exceed 2.5 mcg per serving nor 4.0 mcg per daily serving.
- If marketed for use by children, may not exceed 3.0 micrograms of cadmium per recommended daily serving (based on Canada's limit for a child weighing 75 lbs.). If not marketed for use by children, may not exceed 4.1 micrograms of cadmium per recommended daily serving (above which California's Prop 65 law requires a "reproductive harm" warning due to developmental toxicity and male reproductive harm).
- Contain less than 10 micrograms of arsenic per daily serving (EPA limit and state of New Jersey limits - based on 1 liter of water. Products found to exceed this amount are tested for inorganic arsenic and must contain no more than 2.1 micrograms of inorganic arsenic per daily serving (Canada's limit in natural health products).
- May not exceed 2 micrograms of mercury per daily serving (based on EPA limit for mercury in 1 liter of water).
- Meet recommended USP <2040> parameters of disintegration for dietary supplements (excluding capsule, chewable and time-release products).
- Be in compliance with FDA labeling requirements.