About this trial
This clinical trial aims to explore the effect of Vitamin B6 supplementation on anxiety sensory hyperreactivity in autistic adults. Researchers will compare a placebo group to high-dose Vitamin-B6 to see if vitamin B6 reduce anxiety and sensory reactivity differences in autism.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Between the ages of 18 to 60
With a diagnosis of autism
Disqualifiers
Taking any supplement that contains more than 2mg of Vitamin B6 or taking GABA agonist drugs
Have a medical history of peripheral neuropathy
lactose intolerance (placebo tablet is lactose based)
Trial design
Parallel
Treatments tested in this trial
Pyridoxal 5'-Phosphate (100 mg)
Dietary supplement100 mg Pyridoxal 5'-Phosphate tablet once daily with food
Placebo
Other interventionPlacebo tablet once daily
Treatment groups
Trial outcomes
Primary outcomes
Sensory hyperreactivity
Sensory hyperreactivity will be measured by a subscale of the Sensory Processing Inventory (SP3D.
Sensory hyperreactivity
Sensory hyperreactivity will be measured by a subscale of the Comprehensive Autistic Trait Inventory (CATI).
Anxiety
Anxiety will be measured using the Screen for Adult Anxiety Related Disorders (SCAARED) questionnaire.
Vitamin B6 status
The concentration of different forms of Vitamin B6 in blood plasma will be measured (Pyridoxal-5'-phosphate, pyridoxine, pyridoxal, pyridoxamine)
Secondary outcomes
ADHD traits
Adult Attention Deficit Hyperreactivity Disorder Self-Report Scale (ASRS-v1.1)
Sensory processing differences
These will be measured using the other subscales of the Sensory Processing Inventory (SP3D) that do not constitute the primary sensory hyperreactivity outcome described above.
Sleep quality
Pittsburgh Sleep Quality Index (PSQI)
Visual Surround Suppression of contrast perception
Psychophysical measurements of the contrast threshold will be made, which correspond to the minimum physical stimulus contrast that can be reliably detected by an observer. The test measures the increase in the threshold caused by introducing spatial inhibition of the target stimuli, which is a parameter that has been shown to correlate with GABA concentration in the brain (Yoon et al., 2010).
Sponsors and contacts
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University of Reading
Lead sponsor
INNOPURE
Collaborator