Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The content of Lf in the secretory fluid of human tissues.
| Secretory fluid | Lf concentration | References |
| Breast milk | 1∼3.2 mg/mL | (89) |
| Blood | 0.1∼2.5 μg/mL | (3) |
| Bile | 10∼40 μg/mL | (112) |
| Pancreatic juice | 0.5 mg/mL | (113) |
| Gastric secretion | 0.5∼1.0 mg/mL | (114) |
| Urine | 1 μg/mL | (115) |
| Tear fluid | 0.1∼2.2 mg/mL | (68) |
| Saliva | 0.01∼0.05 mg/mL | (116) |
| Nasal secretion | 0.1 mg/mL | (117) |
