Brief report: autistic symptoms, developmental regression, mental retardation, epilepsy, and dyskinesias in CNS folate deficiency.

Moretti et al. (2008) looked at a small group of children who had CNS folate deficiency.

All of the kids already showed autism traits, developmental loss, seizures, and jerky movements.

The team simply described the cases; they did not test any treatment.

Every child in the series had autistic behaviors along with the low brain folate.

The authors say the link is common, but they give no numbers or outcomes.

Pan et al. (2021) pooled many studies and confirmed that epilepsy and other brain problems show up more often in autism. Their big review includes the CFD-autism link, so the target case series sits inside a wider pattern.

Pu et al. (2013) went a step further. Their meta-analysis showed that a common MTHFR gene variant raises autism risk, especially in countries without folic-acid fortification. This genetic angle helps explain why some kids with autism run short on folate.

Whitehouse et al. (2014) seem to flip the story: moms who took prenatal vitamins had children with fewer autistic-like behaviors. The twist is timing. The 2014 paper looks at prevention during pregnancy, while Moretti et al. (2008) look at full-blown deficiency after birth. Same nutrient, different windows, no real clash.

If a child on your caseload has autism plus regression, seizures, or odd movements, ask the pediatrician to check folate levels in both blood and spinal fluid. Replacing folate early can reverse some deficits, so spotting this mimic keeps you from writing off behaviors as "just autism." It also reminds teams to screen for other treatable medical issues that ride along with ASD.