| Serine protease inhibitor Kazal-type 5 | 120.714 | UniProtKB |
| Serotonin | 0.17621 | UniProtKB |
| Serum amyloid A-1 protein | 13.532 | UniProtKB |
| sFasL | 26 | 7536672 |
| Sgp130 (Soluble Glycoprotein 130) | 103.537 | UniProtKB |
| sIgA | 385 | UniProtKB |
| sIL-1Ra | 17 | 9597123 |
| sIL2R | 30.819 | UniProtKB |
| sIL6R | 40.237 | UniProtKB |
| Silicon Dioxide | 0.060084 | UniProtKB |
