Blood Glucose Levels

Type of Test

Time to
Test

Normal
Values

What value means

Fasting Glucose

8-16 hours fasting

70-110 mg/dl

A healthy fasting glucose level is between 70-90, but up to 110 is within normal limits. A level of 111-125 indicates impaired glucose tolerance/insulin resistance. A fasting level of 126+ indicates type II diabetes.

Glycohemoglobin / Glycosylated Hemoglobin (HbA1c)

anytime

< 6 %

An HbA1c measures glucose levels over the past 3 months. It should be under 6% to show good diabetic control (postprandial glucose levels rarely going above 120). Good control reduces the risk of miscarriage and birth defects.