In a Sept. 22 press conference, the Trump Administration introduced what it says is an “exciting treatment” for autism: leucovorin, a decades-old medicine that treats toxic effects of chemotherapy. Early research suggests it can be helpful for a certain group of people with a neurological condition related to autism, though some medical experts say it's not quite ready to be used as widely as the administration plans.

Here’s what to know about leucovorin.

What is leucovorin?

Leucovorin is a form of folic acid, which is a synthetic form of folate (vitamin B9). Folic acid is important for helping the body make DNA and red blood cells, hair and nail cells, skin cells, and others throughout the body. The American College of Obstetricians and Gynecologists recommends that all women who are

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