Quest Diagnostics Test Code: 19599

Tight glycemic control is essential for preventing the complications of diabetes. 1,5-Anhydroglucitol (1,5-AG) is a glucose-like monosaccharide contained in food. Low blood levels of 1,5-AG are associated with hyperglycemia.

The glycomark test is a type of test that measures the amount of 1,5 Anhydroglucitol (1,5-AG) in the blood. 1,5 AG is a molecule that is very similar to that of glucose. In people with normal glucose control, the levels of this molecule are relatively stable. When there are fluctuations in the blood glucose level, the 1,5 AG levels also fluctuate. The excess 1,5 AG is also excreted with excess glucose by the kidney in the urine. This test serves as an indication of glucose control in the blood over the last 1-2 weeks and can aid in the diagnosis of diabetes, and is similar to, but less reliable than the HbA1c test, which measures glucose control in the blood over a 2 to 3 months period.

This test is performed in following conditions such as:

• Increased thirst and drinking fluids
• Increased urination
• Increased appetite
• Fatigue
• Blurred vision
• Slow-healing infections
• Monitoring blood glucose for people on on medication

Also Known As: 1-5 Anhydroglucitol


Certain medications such as Invokana, sodium-glucose cotransporter 2 (SGLT2) inhibitors, Polygala tenuifolia, Senega syrup, some types of steroids, some α-glucosidase inhibitors and others as well as some medical conditions may affect the results of a Glycomark test. It is recommended to check with your doctor for more information.


Specimen Collected
  • Blood
Estimated Time Taken

Turnaround for this test is typically 4-6 business days.