John Hamilton

The drug is a form of vitamin B called leucovorin.

It's approved for patients undergoing cancer chemotherapy.

In September, FDA Commissioner Dr. Marty McCary suggested Leucovorin might also help many children with autism.

We are going to change the label to make it available.

Hundreds of thousands of kids, in my opinion, will benefit.

The label hasn't changed yet, but the announcement helped create a run on FDA-approved Leucovorin tablets, which were already in short supply.

Now the FDA says it's working with the drug company Pfizer to import tablets that are made in Spain and sold in Canada but are not approved in the U.S.

John Hamilton, NPR News.

In 2017, the journal Science Signaling published a study suggesting one specific form of the protein amyloid beta played a key role in Alzheimer's disease.

The study's senior author was Sylvain Lenné of the University of Minnesota.

Teams at other institutions were unable to replicate the finding, though.

And by 2021, scientists on the website PubPure were alleging that the data in the study had been manipulated.

In 2022, Science Signaling published an expression of concern about the study.

In March of 2025, Lanais resigned from his university post after an investigation raised concerns about the data in several of his studies.

And this week, the journal retracted his paper.

John Hamilton, NPR News.

And I'm Giles Snyder.

This is NPR.

A natural hand doesn't need much guidance.

Just think about picking up that cup of coffee and subconscious circuits in the brain and spine take care of the details.