Caroline Connor's concerns about her son Mason's development began around his first birthday, when she noticed he wasn't talking or using any words. Their pediatrician didn't seem worried, but the speech delay persisted. At 2 and a half, Mason was diagnosed with autism .

The Connors went on a mission, searching for anything that would help.

"We just started researching on our own. And that's when my husband Joe came across Dr. Frye in a research study he was doing," Caroline said.

Dr. Richard Frye, a pediatric neurologist, is one of many doctors searching for treatments that can help kids with autism . He's studying leucovorin, an inexpensive, generic drug derived from folic acid, also known as folate or vitamin B9. Leucovorin is currently prescribed to ease the side effects of

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