A groundbreaking urine test measuring microbiome-derived metabolites is offering families and clinicians a powerful new screening tool for autism. In this in-depth discussion, Dr. James Adams (President & CEO) and Dr. Christina Flynn (Research Director) of Autism Diagnostics Lab, alongside parent advocate Jo Lynn Price-Rojas, share the science behind the gut-brain axis, the validation study published in Molecular Psychiatry, and the life-changing story of her son Peyton — from level 3 autism to thriving in high school with a 3.68 GPA. Discover how biology is adding a crucial, objective piece to the autism puzzle.

The Challenge: Waiting Months or Years for Answers

Autism affects millions of families worldwide, yet for decades, diagnosis has relied almost exclusively on behavioral assessments that can take months or even years to access. These evaluations, while essential, are inherently subjective and often occur after significant developmental windows have already closed.

Today, new research into the gut-brain connection is changing that timeline. A simple, at-home urine test is providing earlier, biology-based insights that can guide families and clinicians toward targeted support far sooner than traditional methods alone.

The Science: Gut Infections, Metabolites, and the Brain

Most children with autism, researchers have found, harbor significant gut infections driven by bacteria and yeast. These microorganisms produce chemicals that can leach from the gut into the bloodstream and brain, disrupting neurological function. Crucially, these same chemicals are excreted in urine, where they can be measured.

We’ve discovered that most children with autism have a major gut infection from gut bacteria and yeast. Those gut bacteria and yeast produce chemicals that leach out of the gut and get into the brain, where they disrupt brain function. And then they’re excreted in the urine, where we can measure them. So we now have a test that allows us to screen for these gut infections.

This screening approach does more than flag potential autism-related biology — it identifies treatable infections that, when addressed, have led to meaningful improvements in quality of life for many children.

How the Test Works: A Simple At-Home Process

The process is straightforward and family-friendly:

1. Order the test kit online at autismdiagnosticslab.com
2. Receive the kit in the mail and collect a urine sample at home using the provided paper cup and syringe
3. Place the sample in the insulated pack, freeze overnight, and ship it back in the prepaid return envelope
4. Receive results in approximately 2–3 weeks

Dr. Christina Flynn, Research Director and lead author of the validating study, notes that the test measures a specific panel of metabolites derived from the microbiome. It is designed as a screening and clinical decision-support tool used alongside — not instead of — a comprehensive evaluation by a trained professional.

The test is currently available across most U.S. states for direct order by families. In a few states, a physician’s order is required.

A Mother’s Story: From Despair to Transformation

Jo Lynn Price-Rojas shares the before-and-after reality that so many families face. Her son Peyton was diagnosed with autism spectrum disorder level 3. He struggled with severe sensory issues, emotional regulation, and eating. The family walked on eggshells. Jo Lynn cried every day in her closet, uncertain how to help her child despite trying countless approaches.

Everything changed when they received objective biological data from the Autism Diagnostics Lab test.

It changed overnight. It was scientific. We had dabbled in other diets before based on suggestions, but we were never consistent until we saw the science behind his complete yeast overgrowth and that he was allergic to gluten and dairy. It was life-changing. It gave me answers I’d been searching for fifteen years.

Within one year of targeted intervention guided by the test results, Peyton’s progress stunned everyone who knew him:

• Diagnosis improved from level 3 to level 1 / level 2
• ADHD diagnosis resolved
• Finished first year of high school with a 3.68 GPA
• Joined chess club, began practicing driving, and is preparing for college
• Became a role model at his school (after previously requiring homeschooling)

He’s a kid that I thought one day would never talk to me or speak to me… People who had known Peyton his entire life can’t believe the difference. This hasn’t been overnight, but in one year the transformation has been remarkable.

Validated by Research

The technology is supported by a recent paper published in Molecular Psychiatry (a Nature Portfolio journal), with Dr. Christina Flynn as lead author. This study is backed by more than 40 additional peer-reviewed studies showing consistent abnormalities in these microbiome-related markers among individuals with autism spectrum disorder.

A standalone diagnosis is subjective because every clinician has their own opinions… This provides a window into the actual underlying biomedical conditions — whether cause or consequence of autism symptoms — helping doctors help their patients.

What Experts Want Parents, Clinicians, and Policymakers to Know

Dr. James Adams stresses the dual benefit of earlier detection and treatment:

Now we know that most children with autism have a gut infection due to bacteria or yeast. If it’s treated, getting rid of that infection can really improve quality of life. It can also help us diagnose children much earlier so they can get important treatment much earlier.

Dr. Christina Flynn offers reassurance to parents and a clear message to policymakers:

First of all, I’d like all parents to know that they did nothing wrong and that this isn’t their fault. We can save a lot of money by intervening earlier, before symptoms are clinically obvious… We can save a lot of money on caring for people with autism.

Jo Lynn Price-Rojas speaks directly to families and decision-makers:

Autism affects the entire family. If we can help families with answers way sooner than I did, imagine if Peyton had been able to take this test 13 years ago. Biology alongside behavior helps us put the pieces of the puzzle together. We need all forms of evaluation so we can really help our children thrive.

The Path Forward

For decades, autism diagnosis has depended largely on observing behavior. What is changing now is the growing recognition that biology can add another vital piece of the puzzle — giving families and clinicians earlier insights and a clearer path forward.

Autism Diagnostics Lab’s metabolite screening test represents one promising step toward integrating objective biological data with traditional clinical expertise.

This article is based on the video interview featuring Solomon Wilcott with Dr. James Adams, Dr. Christina Flynn, and Jo Lynn Price-Rojas. © Autism Diagnostics Lab. For educational and informational purposes.