Red Blood Cell Folate; RBC Folic Acid; Folic Acid; Red Cell Folate; RBC Folate
Quest Diagnostics San Juan Capistrano
0.2-2 mL Whole Blood
Both the HCT and folate will be performed on this tube. If sample is sent frozen, a default hematocrit will be used for calculation of the RBC folate. Do not freeze as this will affect the HCT. Wrap tube in aluminum foil to protect from light.
Room Temp: 72 Hours (5 Days for Folate light protected or amber vial) (48 Hours for Hematocrit); Refrigerated: 72 Hours (5 Days for Folate light protected or amber vial) (48 Hours for Hematocrit); Frozen: 30 Days (Unacceptable for hematocrit)
2 mL Whole Blood
0.2 mL Whole Blood