Health Secretary Robert F. Kennedy Jr. and other officials announced on Sept. 22 that acetaminophen, the active ingredient in Tylenol, may be associated with autism, a disorder with a wide range of symptoms. They also said that leucovorin, or prescription folinic acid, looks like a promising therapy for autism.

Here’s what to know about the new announcement, autism, and folinic acid.

Tylenol Link

Officials said the available evidence regarding a link between acetaminophen, also known as paracetamol, and neurodevelopmental disorders is sufficient to issue a new warning against using acetaminophen during pregnancy.