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A placebo controlled pilot study to explore the affects of GABA tea on children with autistic spectrum conditions

A double-blind, placebo-controlled, crossover-designed GABA tea pilot study in children diagnosed with Autism Spectrum Conditions

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN72571312
Enrollment
9
Registered
2017-11-21
Start date
2016-09-01
Completion date
Unknown
Last updated
2019-05-27

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Autism Spectrum Conditions Mental and Behavioural Disorders Autism Spectrum Conditions

Interventions

Nine children aged 6-14 years with a diagnosis of autism participatein the study. This was a repeated measures design with all children participating in three conditions: oolong tea high in GABA, oolo
2. Placebo Jiao Gu Lan (GABA 157mg/100g, L-Theanine 0mg/100g)
3. L-Theanine Gyokuro Green (GABA 156mg/100g, L-Theanine 1340mg/100g). Counter balanced by randomly assigning order of teas 1 to 3. Children 1,2 and 3 were given tea in the order A,B,C
children 4,5,6 were given tea in the order B,C,A and children 7,8,9 were given tea in the order C,B,A. Participants are asked to drink a cup of tea four times per day, with each main meal and an hour

Sponsors

Coventry University
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. Diagnosis of ASC 2. No known co-occurring ADHD, genetic or medical conditions 3. No current medication 4. A willingness to drink tea 5. The ability to wear a watch without tactile sensitivity 6. Younger than 14 (due to a large increase in testosterone levels after this point (Mayo Foundation for Medical Education and Research website, 1995-2017)) 7. Both parent and child commitment to four university visits and precise tea making and drinking requirements

Exclusion criteria

Exclusion criteria: 1. No diagnosis of ASC 2. Known co-occurring ADHD 3. Genetic or medical conditions 4. Current medication 5. An unwillingness to drink tea 6. Difficulty in wearing a watch due to tactile sensitivity 7. Older than 14 (due to a large increase in testosterone levels after this point (Mayo Foundation for Medical Education and Research website, 1995-2017)) 8. Both parent and child uncommited to four university visits and precise tea making and drinking requirements

Design outcomes

Primary

MeasureTime frame
Autism severity (including social communication, unusual behaviours, anxiety and rigidity) are measured using the ASRS (6-18 Years, Parent form) at the end of the second week of each tea condition

Secondary

MeasureTime frame
1. Sensory responsivity is measured using Sensory Profile 2 at the end of the second week of each tea condition 2. Coordination (manual dexterity, aiming and catching and balance) is measured using The Movement Assessment Battery for Children at the end of the second week of each tea condition 3. Sleep quality, duration and timing measured using Actigraphy sleep monitoring for the duration of the last week of each tea condition 4. Melatonin and cortisol levels are measured using hormone assaying at the end of the second week of each tea condition using saliva samples form the last afternoon, evening and following morning

Countries

United Kingdom

Contacts

Public ContactPenny Hannant

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026