||2 mL (1 mL min.) plasma from 1 GreyTop (Sodium Fluoride) tube AND 2 mL (0.5 mL min.) corresponding serum from 1 SST for each timed specimen. Draw baseline fasting specimen. Dissolve 75g Glucose in adults / 1.75 g / Kg body weight in children (not exceeding 75g) in 300 mL water. Administer orally over a period of 5 minutes. Draw additional specimens at 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 4.0 & 5.0 hours. Note time drawn and test required on each container label and test request form. Overnight fasting mandatory. Ship frozen. DO NOT THAW. Urine specimens NOT REQUIRED.