FactCheck.org’s SciCheck feature focuses exclusively on false and misleading scientific claims that are made by partisans to influence public policy. It was launched in January 2015 with a grant from the Stanton Foundation. The foundation was founded by the late Frank Stanton, president of CBS for 25 years, from 1946 to 1971.
The Food and Drug Administration in recent months has approved a small number of drugs quite quickly under a new expedited review program. But Health and Human Services Secretary Robert F. Kennedy Jr. has overstated the impact of the program by making misleading comparisons to the pace of drug approvals in the past.
In the midst of a court battle over whether to continue to allow access by mail to the medication abortion pill mifepristone, Republican lawmakers have claimed that 10% or more of women who take the drug have serious side effects. A 2025 report from an anti-abortion group that put forward the figure has been criticized by reproductive health researchers for methodological issues and a lack of transparency about its data source.
During an April 17 congressional hearing, Health and Human Services Secretary Robert F. Kennedy Jr. called for retraction of a new Danish study that didn’t find a link between Tylenol and autism, repeatedly calling it “garbage” and baselessly suggesting that it was industry-generated and “fraudulent.”
It’s a common, misleading refrain in anti-vaccine circles: Childhood vaccines may be unsafe because few if any have been tested in placebo-controlled trials before being approved. But that claim misunderstands the vaccine safety testing process and takes advantage of a narrow definition of a placebo, scientists told us.
Elon Musk this week amplified an unfounded claim, based on a distortion of vaccine safety monitoring data, that COVID-19 vaccines killed tens of thousands of people in Germany. The vaccines saved millions of lives worldwide during a deadly pandemic, and serious side effects or deaths from vaccination are rare.
Following an executive order from the Trump administration that promotes production of glyphosate, some Democrats have claimed that the herbicide causes cancer. The science, however, is nuanced. While there is some evidence linking glyphosate to cancers in lab animals or to the blood cancer non-Hodgkin lymphoma in agricultural workers, the findings have been inconsistent.
Trump administration officials have claimed that they are saving Americans over $1.3 trillion by ending regulation of greenhouse gas emissions from cars and trucks. But the figure does not incorporate any benefits of the emissions standards. By one of the Environmental Protection Agency’s own calculations, getting rid of the standards could cost billions.
The Food and Drug Administration on March 10 changed the approval for a version of the prescription drug leucovorin to include people with a very rare genetic condition. FDA Commissioner Dr. Marty Makary had previously implied that the drug’s new label would cover a much broader group of people with autism, saying that “hundreds of thousands of kids” would benefit.
During her confirmation hearing to become surgeon general, Dr. Casey Means had various back-and-forths with senators, who pressed her on topics related to vaccines, her qualifications and disclosure of her conflicts of interest. We looked into the sometimes-dueling claims from Means and the senators.
President Donald Trump has said that Americans are now paying or will pay “the lowest price anywhere in the world for drugs,” thanks to the administration’s negotiations with pharmaceutical companies. The administration has announced discounted cash prices for a small number of brand-name drugs. There isn’t evidence Trump’s deals so far have led to broad decreases in drug prices, nor is it certain they will in the future.