Gold serum separator (SST) tube
Refrigerated (preferred) - 7 days*
Ambient - 8 hours
*Allina Health Laboratory stability studies have shown this analyte to be stable up to 5 days when stored refrigerated in gel tubes.
Chemiluminescent Microparticle Immunoassay (CMIA) and Chemiflex
Female: 14 - 53 ng/dL
Male: 241 - 827 ng/dL
Early-morning testosterone levels in young male individuals are, on average, 50% higher than p.m. levels. Allina Health Laboratory reference ranges have been derived from a.m. specimens.