Many families arrive at the gut-brain conversation through autism, often because of very real digestive discomfort. Here is the honest framing: probiotics do not treat or cure autism, and autism is not a gut problem to be fixed. What researchers are exploring is narrower and more careful, whether supporting the gut microbiome can help with the GI symptoms that are common in autism. Flore approaches this as structure-and-function support only.
A wellness insight, not a diagnosis. The Neurobiome Test and Flore's neurobiotics are wellness tools. They do not diagnose, treat, cure, or prevent autism, ADHD, anxiety, depression, or any condition.
Start with what is actually established
The gut and brain communicate through the gut-brain axis, a two-way network involving the vagus nerve and the gut's own nervous system, and gut microbes take part by producing neurotransmitter molecules.[1] That biology is real. What it does not establish is that changing the microbiome changes autism. Autism is a form of neurodevelopmental diversity, not a disease to be cured.
What the 2024 research actually showed
In 2024, researchers (Phan et al.) published a study in mSystems on precision synbiotics, probiotics plus prebiotics matched to each person's gut data, in autism spectrum disorder. It is important to represent it precisely: this was a pilot open-label study, not a randomized controlled trial.[2]
Of 296 participants enrolled, 170 completed the three-month program with before-and-after data. Over that time, the participants' gut microbiome diversity increased, to the point that it was no longer significantly different from a neurotypical comparison group, and their gastrointestinal symptom scores (GSRS) significantly decreased, indicating less digestive discomfort.[2]
Represent it exactly: Phan et al. (2024, mSystems) was a pilot open-label study, not an RCT. Over 3 months, precision synbiotics were associated with increased gut microbiome diversity and reduced GI symptom severity. Being open-label, the authors noted the improvements fall within the range attributable to placebo effects and require controlled trials to confirm.[2]
That is a genuinely interesting, encouraging signal about gut and digestive comfort. It is not evidence that a probiotic changes autism, and the researchers themselves are careful about its limits.
How Flore talks about this
Flore's language is structure-and-function only: supporting gut microbiome diversity and digestive comfort. We never describe neurobiotics as a treatment, cure, or therapy for autism, and a Neurobiome Test is a wellness insight, not a diagnosis. If you are seeking care, work with a licensed clinician.
Exploring this with us
Flore is exploring the gut-brain connection in autism through precision-microbiome research, and we gather interest from people who would like to learn more. Expressing interest is informational only, not enrollment and not consent; any future participation would have its own eligibility and informed-consent steps.
Express interest in our autism precision research → Explore the Neurobiome Test →
Frequently asked questions
Can probiotics treat autism?
No. Probiotics do not treat, cure, or prevent autism, and autism is not caused by the gut. Some research explores whether supporting the gut microbiome can help with the digestive discomfort that many autistic people experience. Flore frames this as structure-and-function support, never as a therapy for autism itself.
What did the 2024 mSystems study find?
In a 2024 pilot open-label study (not a randomized controlled trial), precision synbiotics matched to each participant's gut data were associated with increased gut microbiome diversity and a significant reduction in gastrointestinal symptom severity over three months. Because it was open-label, the authors noted the results are subject to placebo effects and need controlled trials to confirm.
Is the Neurobiome Test a test for autism?
No. The Neurobiome Test is a wellness insight into your gut-brain microbiome. It does not diagnose autism, ADHD, anxiety, or any condition.
What does 'structure and function' mean here?
It means we talk about supporting normal structures and functions of the body, such as gut microbiome diversity and digestive comfort, rather than diagnosing, treating, or curing a disease. It is the honest, lawful way to describe what a supplement can do.
Sources
- Carabotti M, et al. The gut-brain axis. Ann Gastroenterol, 2015. PMC4367209
- Phan J, et al. Precision synbiotics increase gut microbiome diversity and improve gastrointestinal symptoms in a pilot open-label study for autism spectrum disorder. mSystems, 2024. PMC11097633
Not sure where to start with your gut?
Ask the Flore Microbiome Concierge — a guided, personalized walkthrough of testing, your results, and a formula matched to your goals.
Talk to the Concierge →