Glucose Challenge

Blood Tests for Diabetes Diagnosis: Glucose Challenge

Also known as: GCT; 50 gram glucose challenge; one-hour glucose screening test.

What is it? A screening test that measures blood glucose levels one hour after 50 grams of a glucose solution has been consumed (an extremely sweet drink). If the GCT is elevated, it indicates the need for further testing.

Why is this test performed? To screen for gestational diabetes in pregnant women considered "at risk."

How frequently should this test be performed? Once. If results are abnormal and glucose levels elevated, it should be followed up by a 3-hour oral glucose tolerance test (OGTT).

What is the "normal" range for results? Normal values are 140 mg/dl or less.

What do abnormal results mean? A glucose threshold value >140 mg/dl (7.8 mmol/l) means that gestational diabetes is a possibility and an OGTT is indicated.

Last Modified Date: May 15, 2013

All content on dLife.com is created and reviewed in compliance with our editorial policy.

Sign up for FREE dLife Newsletters

dLife Membership is FREE! Get exclusive access, free recipes, newsletters, savings, and much more! FPO

Congratulations!
You are subscribed!
Congratulations!
You are subscribed!
Congratulations!
You are subscribed!
87 Views 0 comments
by Carey Potash
I used to believe that Disney’s Magic Kingdom was “The Most Magical Place on Earth.” Then I went to Dskate. Where do I begin? I have so many incredible memories to share from our week in Montreal at Dskate – a camp for kids with type 1 diabetes who play hockey. I guess I’ll begin at the beginning. The camp itinerary said that drop off time was between 7:30-8 am and pickup was at 4:30 pm. I kind of laughed at the...