Quincy Bioscience, LLC has taken a decisive legal step to protect its brand and reputation by filing a lawsuit against an individual accused of selling counterfeit versions of its popular dietary supplement. The complaint was filed on November 21, 2025, in the United States District Court for the Northern District of Illinois against Janet Kaliku. Quincy Bioscience alleges that Kaliku engaged in counterfeiting and trademark infringement by unlawfully using the PREVAGEN trademark.
The case centers around Quincy Bioscience’s claims that Janet Kaliku has been selling counterfeit PREVAGEN products through online marketplaces such as eBay. Quincy, a Wisconsin-based biotechnology company known for its cognitive support supplements, asserts that Kaliku’s actions have violated both federal and state laws, including the Lanham Act and Illinois’ Uniform Deceptive Trade Practices Act. According to the complaint, Quincy owns registered trademarks for PREVAGEN, which have been used since 2007 and are widely recognized by consumers across the United States.
Quincy alleges that Kaliku operates under multiple seller profiles on eBay, namely “bargdea0” and “tete-38,” where she sells these counterfeit products. The company discovered this after conducting test purchases from these accounts and confirming that the products received were not genuine PREVAGEN supplements but rather counterfeit items with unknown substances. This alleged misconduct has led to significant financial damage to Quincy Bioscience due to lost sales and harm to its reputation as customers may unknowingly consume counterfeit products believing them to be authentic.
The lawsuit outlines several accusations against Kaliku, including counterfeiting, trademark infringement, false designation of origin, false advertising, and unfair competition. It is claimed that her actions are willful and intended to deceive consumers into believing they are purchasing legitimate PREVAGEN products. Furthermore, Quincy accuses Kaliku of strategically listing these counterfeit products during weekends to evade detection by eBay’s monitoring systems.
In response to these allegations, Quincy Bioscience seeks various forms of relief from the court. They request an injunction preventing Kaliku from further use of their trademarks or any representation suggesting an association with Quincy. Additionally, they seek damages amounting to at least $100,000 in lost revenue due to counterfeit sales over the past year alone. They also demand compensation for profits gained from these sales along with statutory damages under federal law.
Representing Quincy Bioscience in this legal battle are attorneys Jonathan Krit and Manon L. Burns from Amin Wasserman Gurnani LLP based in Chicago. The case has been assigned Case ID: 1:25-cv-14274.
Source: 125cv14274_Quincy_Bioscience_v_Janet_Kaliku_Complaint_Northern_District_of_Illinois .pdf
