Isopure Zero-Carb and Low-Carb Protein Powder

December 2014: This case was voluntarily dismissed without prejudice, the reasons for which have not been disclosed.

November 2014: A class-action lawsuit was filed against Nature’s Best and GNC for allegedly misrepresenting the amount of whey protein in Isopure Zero-Carb and Low-Carb Protein Powders. The complaint alleges that the companies represent that the products are “100% Whey Protein Isolate,” and have 50 grams of protein per serving when, according to plaintiffs, the companies use a practice known as “protein-spiking” (i.e., adding cheaper non-protein ingredients, such as amino acids, to increase the nitrogen content, which then makes it seem like the product contains more protein than it actually has) and, as a result, the products do not contain the type and amount of protein advertised. (Tocci et al v. The Isopure Company, LLC D/B/A Nature’s Best and General Nutrition Corp., Case No. 14-cv-09097, S. D. NY.).

For more information about other class-action lawsuits regarding protein powder and’s coverage of the product, click here.

For more information about other class-action lawsuits regarding protein-spiking and’s coverage of the issue, click here.


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When a complaint is dismissed without prejudice, an amended version of the complaint can be refiled.

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