| Laktoferrin |
| Oligosaccarides and prebiotics |
| Secretory IgA |
| L-arginine |
| Nitrate/Nitrite |
| Platelet-activating factor acetylhydrolase |
| Antioxidant factors |
| Growth factors [Epidermal GF, Heparin-binding EGF-like GF, Transforming GF Β2] |
| Erytropoietin |