| Host and Biospecimen | Status | Mean   | Std   | Min   | Max   | Units | Age | Sex | Health Condition | Data Source | Reference | 
|---|
| Human Blood | Detected and Quantified | 0.429 |  |  |  | uM | Adult (>18 years old) | Not Specified | Gamma-glutamyltransferase deficiency | HMDB | 238530   | 
| Human Blood | Detected and Quantified |  |  | 0.014 | 0.2 | uM | Adult (>18 years old) | Not Specified | Normal | HMDB | 238530   | 
| Human Urine | Detected and Quantified | <2.0 |  |  |  | umol/mmol creatinine | Infant (1 - 6 months old) | Both | Normal | HMDB | 3168222   | 
| Human Urine | Detected and Quantified | <2.0 |  |  |  | umol/mmol creatinine | Infant (0-1 year old) | Both | Normal | HMDB | 3168222   | 
| Human Urine | Detected and Quantified | <2.0 |  |  |  | umol/mmol creatinine | Newborn (0-30 days old) | Both | Normal | HMDB | 3168222   | 
| Human Urine | Detected and Quantified | 7.9 | 3.9 |  |  | umol/mmol creatinine | Adult (>18 years old) | Both | Normal | HMDB | 15992788   | 
| Human Urine | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 16939360   | 
| Human Urine | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 16939360   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Crohn's Disease | HMDB | 17269711   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 17269711   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Ulcerative Colitis | HMDB | 17269711   | 
| Human Blood | Detected and Quantified | 156 | 90 |  |  | uM | Adult (>18 years old) | Both | Schizophrenia | HMDB | 17276036   | 
| Human Blood | Detected and Quantified | 82 | 8 |  |  | uM | Infant (0-1 year old) | Both | Premature | HMDB | 17622957   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 18052033   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Colorectal cancer | HMDB | 19006102   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 19006102   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Not Specified | Not Specified | Normal | HMDB | 19573517   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Irritable bowel syndrome | HMDB | 21330412   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 21330412   | 
| Human Urine | Detected and Quantified | 2.6 |  |  |  | umol/mmol creatinine | Adult (>18 years old) | Both | Normal | HMDB | 21388201   | 
| Human Urine | Detected and Quantified | 0.0064 |  |  |  | umol/mmol creatinine | Adult (>18 years old) | Both | ADPKD  | HMDB | 21389975   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Irritable bowel syndrome | HMDB | 21761941   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 21761941   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Ulcerative colitis | HMDB | 21761941   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Infant (0-1 year old) | Both | Normal | HMDB | 22411374   | 
| Human Saliva | Detected and Quantified | 38.26 | 29.05 |  |  | uM | Adult (>18 years old) | Male | Alzheimer's disease | HMDB | 23857558   | 
| Human Saliva | Detected and Quantified | 43.79 | 10.57 |  |  | uM | Adult (>18 years old) | Male | Frontotemporal lobe dementia | HMDB | 23857558   | 
| Human Saliva | Detected and Quantified | 47.82 | 18.36 |  |  | uM | Adult (>18 years old) | Both | Lewy body disease | HMDB | 23857558   | 
| Human Saliva | Detected and Quantified | 67.51 | 75.14 |  |  | uM | Adult (>18 years old) | Female | Normal | HMDB | 23857558   | 
| Human Urine | Detected and Quantified | 8.5 |  | 3.3 | 18.4 | umol/mmol creatinine | Adult (>18 years old) | Both | Normal | HMDB | 24023812   | 
| Human Breast milk | Detected and Quantified | 1600 | 320 |  |  | uM | Adult (>18 years old) | Female | Normal | HMDB | 24027187   | 
| Human Blood | Detected and Quantified | 52.21 (14.83) |  |  |  | uM | Adult (>18 years old) | Female | Pregnancy with fetus having congenital heart defect | HMDB | 24704061   | 
| Human Blood | Detected and Quantified | 56.4 (12.69) |  |  |  | uM | Adult (>18 years old) | Female | Pregnancy | HMDB | 24704061   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 25037050   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Colorectal cancer | HMDB | 25037050   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 25670064   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Not Specified | Normal | HMDB | 25985090   | 
| Human Feces | Detected and Quantified | 11117 |  |  |  | nmol/g wet feces | Adult (>18 years old) | Not Specified | Normal | HMDB | 26416813   | 
| Human Feces | Detected and Quantified | 11382 |  |  |  | nmol/g wet feces | Adult (>18 years old) | Not Specified | Normal | HMDB | 26416813   | 
| Human Feces | Detected and Quantified | 8923 |  |  |  | nmol/g wet feces | Adult (>18 years old) | Not Specified | Normal | HMDB | 26416813   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Colorectal cancer | HMDB | 27015276   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 27107423   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Colorectal cancer | HMDB | 27107423   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 27543620   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Children (6 - 18 years old) | Not Specified | Crohns disease | HMDB | 27609529   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Children (6 - 18 years old) | Not Specified | Ulcerative colitis | HMDB | 27609529   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Children (6 - 18 years old) | Not Specified | Unclassified IBD  | HMDB | 27609529   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Children (6 - 18 years old) | Not Specified | Normal | HMDB | 27609529   | 
| Human Feces | Detected and Quantified | 880 | 680 |  |  | nmol/g wet feces | Adult (>18 years old) | Both | Normal | HMDB | 27624970   | 
| Human Feces | Detected and Quantified | 490 | 390 |  |  | nmol/g wet feces | Adult (>18 years old) | Both | Normal | HMDB | 27624970   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 29808030   | 
| Human Saliva | Detected and Quantified | 14.5 | 19.8 |  |  | uM | Adult (>18 years old) | Not Specified | Normal | HMDB | Sugimoto, M., Saruta, J., Matsuki, C. et al. (2013) Physiological and environmental parameters associated with mass spectrometry-based salivary metabolomic profiles. Metabolomics, 9, 454–463 (2013). https://doi.org/10.1007/s11306-012-0464-y | 
| Human Saliva | Detected and Quantified | 123.84 | 110.2 |  |  | uM | Adult (>18 years old) | Both | Normal | HMDB | https://doi.org/10.1007/s11306-015-0840-5 | 
| Human Saliva | Detected and Quantified | 14.9 | 7.6 |  |  | uM | Adult (>18 years old) | Not Specified | Normal | HMDB | Sugimoto, M., Saruta, J., Matsuki, C. et al. (2013) Physiological and environmental parameters associated with mass spectrometry-based salivary metabolomic profiles. Metabolomics, 9, 454–463 (2013). https://doi.org/10.1007/s11306-012-0464-y | 
| Human Saliva | Detected and Quantified | 14.5 | 6.75 |  |  | uM | Adult (>18 years old) | Both | Normal | HMDB | Sugimoto, M., Saruta, J., Matsuki, C. et al. (2013) Physiological and environmental parameters associated with mass spectrometry-based salivary metabolomic profiles. Metabolomics, 9, 454–463 (2013). https://doi.org/10.1007/s11306-012-0464-y | 
| Human Saliva | Detected and Quantified | 13.5 | 8.75 |  |  | uM | Adult (>18 years old) | Female | Normal | HMDB | Sugimoto, M., Saruta, J., Matsuki, C. et al. (2013) Physiological and environmental parameters associated with mass spectrometry-based salivary metabolomic profiles. Metabolomics, 9, 454–463 (2013). https://doi.org/10.1007/s11306-012-0464-y | 
| Human Saliva | Detected and Quantified | 43.4 | 55.1 |  |  | uM | Adult (>18 years old) | Male | Normal | HMDB | Sugimoto, M., Saruta, J., Matsuki, C. et al. (2013) Physiological and environmental parameters associated with mass spectrometry-based salivary metabolomic profiles. Metabolomics, 9, 454–463 (2013). https://doi.org/10.1007/s11306-012-0464-y | 
| Human Saliva | Detected and Quantified | 8.91 | 3.9 |  |  | uM | Adult (>18 years old) | Both | Normal | HMDB | Sugimoto, M., Saruta, J., Matsuki, C. et al. (2013) Physiological and environmental parameters associated with mass spectrometry-based salivary metabolomic profiles. Metabolomics, 9, 454–463 (2013). https://doi.org/10.1007/s11306-012-0464-y | 
| Human Saliva | Detected and Quantified | 38.26  |  29.05 |  |  | uM | Adult (>18 years old) | Male | Alzheimer's disease | HMDB | 23857558   | 
| Human Urine | Detected and Quantified | 0.0064 |  |  |  | umol/mmol creatinine | Adult (>18 years old) | Both | ADPKD  | HMDB | 21389975   | 
| Human Saliva | Detected and Quantified | 43.79  |  10.57 |  |  | uM | Adult (>18 years old) | Male | Frontotemporal lobe dementia | HMDB | 23857558   | 
| Human Blood | Detected and Quantified | 0.429 |  |  |  | uM | Adult (>18 years old) | Not Specified | Gamma-glutamyltransferase deficiency | HMDB | 238530   | 
| Human Saliva | Detected and Quantified | 47.82  |  18.36 |  |  | uM | Adult (>18 years old) | Both | Lewy body disease | HMDB | 23857558   | 
| Human Blood | Detected and Quantified | 56.4  | 12.69 |  |  | uM | Adult (>18 years old) | Female | Pregnancy | HMDB | 24704061   | 
| Human Blood | Detected and Quantified | 156.0  |  90.0 |  |  | uM | Adult (>18 years old) | Both | Schizophrenia | HMDB | 17276036   | 
| Human Urine | Detected and Quantified | 2.6 |  |  |  | umol/mmol creatinine | Adult (>18 years old) | Both | Normal | HMDB | 21388201   | 
| Human Feces | Detected and Quantified | 8923 |  |  |  | nmol/g wet feces | Adult (>18 years old) | Not Specified | Normal | HMDB | 26416813   | 
| Human Feces | Detected and Quantified | 11117 |  |  |  | nmol/g wet feces | Adult (>18 years old) | Not Specified | Normal | HMDB | 26416813   | 
| Human Feces | Detected and Quantified | 11382 |  |  |  | nmol/g wet feces | Adult (>18 years old) | Not Specified | Normal | HMDB | 26416813   | 
| Human Urine | Detected and Quantified | <2.0 |  |  |  | umol/mmol creatinine | Infant (1 - 6 months old) | Both | Normal | HMDB | 3168222   | 
| Human Urine | Detected and Quantified | <2.0 |  |  |  | umol/mmol creatinine | Infant (0-1 year old) | Both | Normal | HMDB | 3168222   | 
| Human Urine | Detected and Quantified | <2.0 |  |  |  | umol/mmol creatinine | Newborn (0-30 days old) | Both | Normal | HMDB | 3168222   | 
| Human Blood | Detected and Quantified |  |  | 0.0140 | 0.200 | uM | Adult (>18 years old) | Not Specified | Normal | HMDB | 238530   | 
| Human Breast milk | Detected and Quantified | 1600  |  320 |  |  | uM | Adult (>18 years old) | Female | Normal | HMDB | 24027187   | 
| Human Feces | Detected and Quantified | 490  |  390 |  |  | nmol/g wet feces | Adult (>18 years old) | Both | Normal | HMDB | 27624970   | 
| Human Saliva | Detected and Quantified | 67.51  |  75.14 |  |  | uM | Adult (>18 years old) | Female | Normal | HMDB | 23857558   | 
| Human Urine | Detected and Quantified | 7.9  |  3.9 |  |  | umol/mmol creatinine | Adult (>18 years old) | Both | Normal | HMDB | 15992788   | 
| Human Urine | Detected and Quantified | 8.5  |  | 3.3 | 18.4 | umol/mmol creatinine | Adult (>18 years old) | Both | Normal | HMDB | 24023812   | 
| Human Feces | Detected and Quantified | 880  |  680 |  |  | nmol/g wet feces | Adult (>18 years old) | Both | Normal | HMDB | 27624970   | 
| Human Saliva | Detected and Quantified | 13.5 | 8.75 |  |  | uM | Adult (>18 years old) | Female | Normal | HMDB | Sugimoto et al. (2013) Physiological and environmental parameters associated with mass spectrometry-based salivary metabolomic profiles.  | 
| Human Saliva | Detected and Quantified | 14.5 | 19.8 |  |  | uM | Adult (>18 years old) | Not Specified | Normal | HMDB | Sugimoto et al. (2013) Physiological and environmental parameters associated with mass spectrometry-based salivary metabolomic profiles.  | 
| Human Saliva | Detected and Quantified | 14.5 | 6.75 |  |  | uM | Adult (>18 years old) | Both | Normal | HMDB | Sugimoto et al. (2013) Physiological and environmental parameters associated with mass spectrometry-based salivary metabolomic profiles.  | 
| Human Saliva | Detected and Quantified | 14.9 | 7.60 |  |  | uM | Adult (>18 years old) | Not Specified | Normal | HMDB | Sugimoto et al. (2013) Physiological and environmental parameters associated with mass spectrometry-based salivary metabolomic profiles.  | 
| Human Saliva | Detected and Quantified | 43.4 | 55.1 |  |  | uM | Adult (>18 years old) | Male | Normal | HMDB | Sugimoto et al. (2013) Physiological and environmental parameters associated with mass spectrometry-based salivary metabolomic profiles.  | 
| Human Saliva | Detected and Quantified | 8.91 | 3.90 |  |  | uM | Adult (>18 years old) | Both | Normal | HMDB | Sugimoto et al. (2013) Physiological and environmental parameters associated with mass spectrometry-based salivary metabolomic profiles.  | 
| Human Saliva | Detected and Quantified | 123.84 | 110.2 |  |  | uM | Adult (>18 years old) | Both | Normal | HMDB | https://doi.org/10.1007/s11306-015-0840-5 | 
| Human Epidermis | Detected but not Quantified |  |  |  |  |  | Not Specified | Not Specified | Normal | HMDB | 34986597   | 
| Human Fibroblasts | Detected but not Quantified |  |  |  |  |  | Not Specified | Not Specified | Normal | HMDB | 34986597   | 
| Human Intestine | Detected but not Quantified |  |  |  |  |  | Not Specified | Not Specified | Normal | HMDB | 34986597   | 
| Human Neuron | Detected but not Quantified |  |  |  |  |  | Not Specified | Not Specified | Normal | HMDB | 34986597   | 
| Human Placenta | Detected but not Quantified |  |  |  |  |  | Not Specified | Not Specified | Normal | HMDB | 34986597   | 
| Human Spleen | Detected but not Quantified |  |  |  |  |  | Not Specified | Not Specified | Normal | HMDB | 34986597   | 
| Human Testis | Detected but not Quantified |  |  |  |  |  | Not Specified | Not Specified | Normal | HMDB | 34986597   | 
| Human Urine | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 16939360   | 
| Human Urine | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 16939360   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Saliva | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Male | Normal | HMDB | 22308371   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 17269711   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 18052033   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 19006102   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Not Specified | Not Specified | Normal | HMDB | 19573517   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 21330412   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 21761941   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Infant (0-1 year old) | Both | Normal | HMDB | 22411374   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 25670064   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Children (6 - 18 years old) | Not Specified | Normal | HMDB | 27609529   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 27543620   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 25037050   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Not Specified | Normal | HMDB | 25985090   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 27107423   | 
| Human Feces | Detected but not Quantified |  |  |  |  |  | Adult (>18 years old) | Both | Normal | HMDB | 29808030   |