How do I know if I have diabetes?

Virta Health

By Dr. Jeff Stanley

Type 2 diabetes is diagnosed in a number of ways. These include a fasting glucose of > or = 126 mg/dL, a hemoglobin a1c of 6.5% or greater, or elevated glucose on an oral glucose tolerance test. In addition, a random glucose of >200 is suggestive of diabetes.

However, there are a number of signs and symptoms that suggest type 2 diabetes and should make you consider getting a blood test. These include excessive thirst, frequent urination, blurred vision, numbness or tingling of extremities, weight gain and fatigue. Other possible symptoms include erectile dysfunction in men and irregular periods in women.

Learn more about the dietary changes required to reverse diabetes without increasing medication in Reversing Diabetes 101 by Dr. Sarah Hallberg.


Bays HE, Bazata DD, Clark NG, et al. Prevalence of self-reported diagnosis of diabetes mellitus and associated risk factors in a national survey in the US population: SHIELD (Study to Help Improve Early evaluation and management of risk factors Leading to Diabetes). BMC Public Health. 2007;7:277. Published 2007 Oct 3. doi:10.1186/1471-2458-7-277

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