Naked Nutrition Lawsuit Alleges Mass Gainer Vegan Protein Powder Contains Dangerous Levels of Heavy Metals

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A proposed class action lawsuit claims that Naked Nutrition’s Mass Vegan Mass Gainer protein powder contains dangerous, undisclosed levels of lead and other heavy metals.

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The 39-page false advertising lawsuit says that just one serving of the Naked protein powder contains 7.7 micrograms of lead, about 1,570 percent higher than California's maximum daily limit recommended for consumption. The suit emphasizes that many major health agencies, including the World Health Organization, hold that, due to the health risks associated with heavy metals, there exists no safe level of exposure to lead.

The class action lawsuit charges that defendant Naked Whey, Inc. has intentionally misrepresented its Mass Vegan Mass Gainer protein powder by touting the supplement as a premium product “with nothing to hide,” and by including no label disclosure about the presence of heavy metals.

“Despite the known health risks, [Naked Nutrition] knowingly, recklessly, negligently, and/or intentionally chose to misrepresent the true quality and nutritiousness of the Products when, in fact, the Products contained or risked containing Heavy Metals,” the suit alleges.

Per the complaint, the lead measurements were ascertained in October 2025 during an investigation conducted by Consumer Reports (CR) on the level of heavy metals in popular protein powders. The Naked Nutrition Vegan Mass Gainer powder had the highest “level of concern” for lead and was one of only two supplements that CR recommended avoiding entirely, the filing notes.

According to the case, exposure to lead is “toxic to humans regardless of age or health status,” as heavy metals are known neurotoxins. Several health agencies, like the Centers for Disease Control and Prevention, have decades of research acknowledging the irreversible health risks associated with lead exposure, such as impaired cognitive development, reduced IQ, behavioral disorders, learning disabilities, pregnancy complications and long-term cardiovascular, renal, and neurological conditions, the case relays.

Despite the well-documented dangers of heavy metals, Naked Nutrition has not disclosed the heightened levels of lead in its products, the lawsuit claims. Moreover, the suit contends that Naked Nutrition should have been aware of the presence of lead due to robust industry standards in product testing and the company’s own emphasis on having “nothing to hide” in its ingredients list. 

The plaintiff is a California resident who purchased the Naked Nutrition products at issue several times between October 2024 and October 2025. Because of the alleged lead levels in the product, the plaintiff claims he “…was injured when he paid the purchase price or price premium” for a supplement represented as a “high-quality, nutritious, plant-based protein powder.”

In a statement to Healthline Magazine after the CR investigation was published, Naked Nutrition said that it takes “customers’ health and product transparency extremely seriously,” and assured that, “on a per-gram basis, our results [for the Mass Vegan Mass Protein powder] are consistent with other plant-based protein products.”

The Naked Nutrition class action lawsuit looks to cover anyone in the United States who purchased the company’s Mass Vegan Mass Gainer powder for personal and/or household consumption during the applicable statute of limitations period.

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