Metabolic approaches to the treatment of autism spectrum disorders.

Page (2000) wrote a story-style review about metabolic problems that look like autism.

The paper lists rare disorders such as PKU, mitochondrial disease, and cerebral folate deficiency.

It urges doctors to run blood, urine, and genetic tests before calling a child autistic.

Some metabolic illnesses copy autism so well that ABA can miss the real cause.

Red flags are late-onset traits, seizures, vomiting, or sudden skill loss.

Special diets or vitamins can ease symptoms if the right disorder is caught.

Cohen et al. (2005) turned the same idea into a clinic checklist you can use today.

Moss et al. (2009) showed that PKU and other syndromes create ASD-like behaviors that need tailored plans.

Miltenberger et al. (2013) and Sánchez-Gómez et al. (2023) later proved that many kids with autism also eat too little calcium, vitamin D, and fiber, so nutrition screening is now standard.

Before you write a behavior plan, ask parents when symptoms started and order a metabolic work-up if the story feels off. Correcting a folate or amino-acid disorder can unlock progress that pure ABA cannot reach.