Understanding blood glucose level ranges can be a key part of diabetes self-management and yesterday during the JUBS webinar we talked extensively on managing diabetes.
Here we will be stating ‘normal’ blood sugar ranges .
If a person with diabetes has a meter, test strips and is testing, it’s important to know what the blood glucose level means. We recommend the Fine test Glucometer which can be purchased from us at a major discount.
Normal and diabetic blood sugar ranges
For the majority of healthy individuals, normal blood sugar levels are as follows:
Between 4.0 to 5.4 mmol/L (72 to 99 mg/dL) when fasting 
Up to 7.8 mmol/L (140 mg/dL) 2 hours after eating
For people with diabetes, blood sugar level targets are as follows:
Before meals : 4 to 7 mmol/L for people with type 1 or type 2 diabetes
After meals : under 9 mmol/L for people with type 1 diabetes and under 8.5mmol/L for people with type 2 diabetes
Other tests that can be done include:
Random plasma glucose test
A blood sample for a random plasma glucose test can be taken at any time. This doesn’t require as much planning and is therefore used in the diagnosis of type 1 diabetes when time is of the essence.
Fasting plasma glucose test
A fasting plasma glucose test is taken after at least eight hours of fasting and is therefore usually taken in the morning.
The NICE guidelines regard a fasting plasma glucose result of 5.5 to 6.9 mmol/l as putting someone at higher risk of developing type 2 diabetes, particularly when accompanied by other risk factors for type 2 diabetes.
Oral Glucose Tolerance Test (OGTT)
An oral glucose tolerance test involves first taking a fasting sample of blood and then taking a very sweet drink containing 75g of glucose.
After having this drink you need to stay at rest until a further blood sample is taken after 2 hours.
HbA1c test for diabetes diagnosis
An HbA1c test does not directly measure the level of blood glucose, however, the result of the test is influenced by how high or low your blood glucose levels have tended to be over a period of 2 to 3 months.
Indications of diabetes or prediabetes are given under the following conditions:
Normal: Below 42 mmol/mol (6.0%)
Prediabetes: 42 to 47 mmol/mol (6.0 to 6.4%)
Diabetes: 48 mmol/mol (6.5% or over)