| parent | Small molecules | LP31415-0 | 
| child | Gamma aminobutyrate.free | LP157335-3 | 
| child | Gamma aminobutyrate | Amniotic fluid | Chemistry - non-challenge | LP386209-3 | 
| child | Gamma aminobutyrate | DBS | Chemistry - non-challenge | LP386210-1 | 
| child | Gamma aminobutyrate/Creatinine | LP286067-6 | 
| child | Gamma aminobutyrate | Body fluid | Chemistry - non-challenge | LP386211-9 | 
| child | Gamma aminobutyrate | Cerebral spinal fluid | Chemistry - non-challenge | LP386212-7 | 
| child | Gamma aminobutyrate | Plasma | Chemistry - non-challenge | LP386213-5 | 
| child | Gamma aminobutyrate | Serum or Plasma | Chemistry - non-challenge | LP386214-3 | 
| child | Gamma aminobutyrate | Urine | Chemistry - non-challenge | LP386215-0 | 
| child | Gamma aminobutyrate | Fetus | Chemistry - non-challenge | LP386217-6 | 
| STATUS | ACTIVE | 
| PartDisplayName | en-US | Gamma aminobutyrate | 
| DisplayName | en-US | Gamma aminobutyrate | 
LOINC Version: 2.81