HOW PRODUCTS WERE EVALUATED:

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, and direct sales or multi-level marketing companies. Products were not accepted directly from manufacturers.

Testing Methods:


Products were tested for theĀ amount of acetyl-L-carnitine by High Performance Liquid Chromatography (HPLC) using Ultra Violet (UV) detection.

Disintegration of non-chewable, non-capsule, non-enteric coated and non-time release formulations was analyzed by ConsumerLab.com utilizing USP (United States Pharmacopeia) <2040> methodology.

Products failing to meet any Passing Score were re-tested in a second independent laboratory using similar methods and instrumentation.

ConsumerLab.com may modify or use other appropriate test methods if necessary to test special product formulations.

Passing Score: *


To pass testing, a product had to:
  1. Contain a minimum of 100% and not exceed 150% of label claim for acetyl-L-carnitine (free base) or acetyl-L-carnitine complexes (e.g. acetyl-l-carnitine hydrochloride)
  2. Meet recommended USP parameters for disintegration for nutritional supplements (excluding capsule, chewable and time-release products).
  3. Meet FDA labeling requirements.
* 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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