Clinical trial Recruiting at 1 site Interventional Ages 18 to 65

MRS Measurement of Glutamate and GABA Metabolism in Brain

Run by National Institutes of Health Clinical Center (CC) · NCT00109174 · Data updated 2026-11-12

This study is testing how levels of two important brain chemicals, glutamate and GABA, change in people to better understand their role in brain health.

More Normal Physiology trials

Quick facts

Study typeInterventional
Ages18 Years to 65 Years
SexAll
Enrollment200 (estimated)
SponsorNational Institutes of Health Clinical Center (CC)
NIH
Locations1 site (Bethesda, Maryland)
StatusRecruiting
StartedSeptember 6, 2006
Main results expectedJanuary 11, 2030
Study endsMarch 11, 2030
Registry record updatedOctober 29, 2026
Trial IDNCT00109174 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Unknown

Probably not a fit

Unknown

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

Processing failed - manual review needed

Why it matters

Potential benefit: Unknown

How similar studies have gone: Unknown

Who can join: the full rules

Show full inclusion / exclusion criteria
* INCLUSION CRITERIA:
* 18-65 years of age
* Able to give written informed consent
* Healthy based on medical history and physical exam
* Enrolled in Protocol 01-M-0254 or Protocol 17-M-0181

EXCLUSION CRITERIA:

* Any current Axis 1 diagnosis
* Clinically significant laboratory abnormalities
* Positive HIV test
* Metallic foreign bodies that would be affected by the magnetic resonance imaging (MRI) magnet, or fear of enclosed spaces likely to make the subject unable to undergo an MRI scan.
* History of neurological illness or injury with the potential to affect study data interpretation, such as multiple sclerosis, Parkinson s disease, seizure disorder or traumatic brain injury
* Prescription psychotropic medication, drug free less than 8 weeks (anticholinergics, benzodiazepine, fluoxetine, antipsychotics, and anticonvulsants)
* Serious medical illness as determined from H\&P or laboratory testing including Diabetes
* Inability to lie flat on camera bed for about two and a half hours
* Pregnant or breastfeeding
* Current substance use disorder based on DSM-5
* NIMH employees and staff and their immediate family members will be excluded from the study per NIMH policy.

Where it's running

  • National Institutes of Health Clinical Center
    Bethesda, Maryland, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.