ASD Probiotic Research

An ASD-Probiotic trial is being run by UCL and University College Hospital. It is a clinical trial of a probiotic for children with autism and gastrointestinal symptoms aged 3-16. They are requesting volunteers for research.

The trial is a double-blind placebo controlled crossover trial which means that every participant will get the active treatment for 12 weeks and also the placebo for 12 weeks with a 4 week break in the middle. Each participant will be involved in the study for almost 7 months. It involves a maximum of 3 visits to University College Hospital which is near London Euston station over the course of 7 months, for the child participant and their primary carer. Your child may need to take time off school to attend the hospital visits. Unfortunately, we are not able to refund travel expenses. There are no blood tests involved but we do ask parents to collect a stool sample from their child 3 times during the trial. Trial participants must not have taken probiotics or antibiotics for 1 month prior to enrolment to the study.

The probiotic being used for the trial is called Vivomixx and more information about this can be found at

You can find out more about the trial here:

If you have questions about the study, please email me on and I will be happy to answer them.

If you think this might be of benefit to your child and you are interested in answering some questions to see if your child is eligible for the study, , please email with your name, phone number and some dates and times that it is convenient for me to call you. I can then go through the eligibility screening process with you and tell you whether your child would be able to join the study. If your child meets the eligibility criteria, you will be sent a detailed information sheet and given time to consider whether you wish to enrol.

Thank you for your interest,

Susan Simmons