 Our study found that the rate at which plasma glucose decreases with time varies depending on the type of anticoagulant used. Specifically, sodium citrate, EDTA, fluoride oxalate, and serum all had different rates of decrease. The rate of decrease was also affected by the amount of glucose present prior to storage. In general, the more glucose present, the faster the decrease in glucose levels. Additionally, we found that transporting blood on ice slurry and separating serum within 30 minutes can reduce the rate of decrease in glucose levels without adding any additional anticoagulants. This suggests that rapid separation of serum and transportation on ice slurry may be beneficial for preserving glucose levels during storage. This article was authored by Khalid S. Al-Salhan, Iman K. Saad and Aml J. Aznain.