Table 2.
Melatonin levels in human biological fluids (when available)
| Fluid | Melatonin (pg/ml) | Species | References |
|---|---|---|---|
| Cerebrospinal fluid | 1.47–542 | Human | [74] |
| Bile | 2,000–11,000 | Pig, rat, guinea pig, rabbit, human, monkey | [199] |
| Follicular fluid |
36.5 ± 4.8 12.4–23.8 |
Human Human |
[245] [246] |
| Amniotic fluid (labor) | 25–158 | Human | [301] |
| Saliva | 11–63 | Human | [296, 297] |
| Synovial fluid (RA) | 79.8 ± 38.9 | Human | [299] |
| Breast milk (night) | 36–99 | Human | [305, 307, 308] |
| Anterior chamber of lens | 28–70* | Rabbit | [143] |
References include only those related to the original report of melatonin in a given fluid; more information in the text
RA rheumatoid arthritis
* Expressed in pg/lens