CSPI’s Litigation Department and its co-counsel at the ACLU and Protect Democracy Project sued the National Institutes of Health (NIH) and the U.S. Department of Health and Human Services (HHS), challenging the new policy that led to the abrupt and unlawful cancellation of research grants and the halt of the application process for new grants.

In November 2024, CSPI filed an amicus brief in the Eastern District of Texas supporting the FDA’s Final Rule expanding oversight over LDTs.

On May 8, 2024, CSPI sued FDA to compel a decision on a maximum limit of opiate alkaloid contamination of poppy seeds. CSPI, represented by CSPI’s litigation department, alleged that FDA’s failure to act on the more than 3-year-old petition seeking to protect consumers from contaminated poppy seeds violates the Administrative Procedure Act.

Public Citizen and CSPI, represented by Public Citizen Litigation Group, filed an amicus brief at the U.S. Supreme Court on January 30, 2024, supporting FDA’s decision to increase access to the approved drug mifepristone, a safe and effective medication used to terminate early pregnancies.

CSPI’s Litigation Department is co-counsel in a class action lawsuit against Back to Nature alleging it misleads consumers about the whole grain content of its crackers.

CSPI’s lawsuit alleges that EpicGenetics makes false and misleading claims about its laboratory-developed tests intended to diagnose fibromyalgia and “Immune Deficiency Disease.”

CSPI's lawyers and co-counsel sued the TTB and Treasury Department to compel a decision on mandatory alcohol content, calorie, ingredient, and allergen labeling on alcoholic beverages.

In December 2021, CSPI along with a coalition of health advocacy groups filed two related lawsuits seeking to force FDA to decide whether to ban twenty-eight phthalates in food packaging and processing materials.

CSPI's lawyers and co-counsel filed a lawsuit that seeks to reverse the Trump-era Sunset Rule and prevent the substantial harm it would cause to public health.

CSPI and other public health groups submitted an amicus brief in support of San Francisco in litigation brought against its proposed sugary drink warning.

CSPI and other public interest groups submitted an amicus brief arguing that states may adopt stricter food safety laws than the federal government.

CSPI is co-counsel in a class action lawsuit against Costco and NBTY, Inc. for misleading brain health claims on their ginkgo biloba dietary supplement.

CSPI and another non-profit organization brought suit to stop the weakening of nutrition standards for school meals by USDA.

CSPI and other groups filed a lawsuit seeking to force FDA to decide whether to prohibit seven cancer-causing chemicals.

CSPI filed an amicus brief supporting the FTC and New York in their enforcement action against Prevagen for making misleading memory enhancement claims.

CSPI was co-counsel in a lawsuit against the Coca-Cola Company and the American Beverage Association contending that they misled the public about the health harms related to sugary drinks.

CSPI and another organization filed a lawsuit challenging the FDA’s delay in implementing the menu labeling requirements.

CSPI and other groups filed a lawsuit challenging a FDA rule that permits companies to self-certify chemical additives used in food as safe without any notice to the agency or the public.

CSPI filed an amicus objection to the proposed settlement of a class action accusing Quorn of deceptive marketing.

CSPI's lawyers and co-counsel filed a lawsuit against PepsiCo claiming that its Naked Juice line of beverages is marketed and labeled in a false and misleading manner.

CSPI joined in an amicus brief in support of NYC in litigation brought against its proposal to require sodium warning icons on chain restaurant menus.

CSPI's lawyers and co-counsel filed a class-action lawsuit against Kellogg claiming that it misleadingly labeled its Cheez-It Whole Grain crackers.

CSPI's lawyers and co-counsel filed a class-action lawsuit against CVS for false and misleading advertising of its Algal-900 DHA supplement.

CSPI's lawyers and co-counsel filed a lawsuit alleging that General Mills falsely and misleadingly marketed Cheerios Protein as a high-protein and healthful alternative to original Cheerios.

CSPI's lawyers and co-counsel sent a demand letter to Plum Organics concerning misleading labeling of infant food products.