What is normal blood sugar level?

For people not diagnosed with diabetes a normal blood sugar level is 4-6mmol/l on an empty stomach. If you are diagnosed with diabetes these numbers will be hard to reach without the intervention of injected insulin, or without following a strict diet.

Normal blood sugar level for adult is as follows below.

A normal blood sugar level is anything in between 72 mg/dL and 108 mg/dL (4 to 6 mmol/L) for a healthy person. For children up to 6 years of age normal blood sugar level before eating is between 100 mg/dL (5.5 mmol/L) and 180 mg/dL (10 mmol/L). Before sleep values should be between 110 mg/dL (6.1 mmol/L) and 200 mg/dL (11.1 mmol/L). For children between the age of 6 and 12, before eating, normal blood sugar level should be between 90 mg/dL (5 mmol/L) and 180 mg/dL (10 mmol/L). Before sleep values should be between 100 mg/dL (5.5 mmol/L) and 180 mg/dL (10 mmol/L).

Units of measure for normal blood sugar level

The blood glucose levels can be divided into two units specify: “milligrams per deciliter” (mg/dl) or “millimoles per liter” (mmol/l). In a healthy person the normal blood sugar level varies slightly. In the fasting state, it should be less than 100 mg / dl (5.6 mmol / l). After a meal, the value should still remain lower than 140 mg/dl (7.8 mmol / l).

Goal of diabetes therapy is to approach these standard values (also referred to as normal blood sugar level) ​​and the natural course of blood glucose levels and to avoid particularly high values ​​after meals. Such short-term spikes in blood sugar induce the development of vascular lesions such as arteriosclerosis. On the other hand, the blood sugar levels may not be as lowered fast as this puts a patient in danger of experiencing hypoglycaemia. If you are diagnosed with diabetes (either type 1 or type 2) always ensure that you are in control of your blood sugar levels. Keeping a normal blood sugar level is not only healthy but is also mandatory as well. Normal blood sugar level is the ground zero for every diabetic.

The long-term blood sugar HbA1c

Because when measuring blood sugar level we always take a snapshot of current values the so-called HbA1c test was introduced. Your doctor will measure your blood sugar level every three months to determine your average blood sugar levels and comparing it to normal blood sugar level. This is also known as “long-term value” or “blood sugar memory”. The HbA1c value indicates how many glucose molecules have docked with the red blood cells – the higher the blood sugar levels the more did so. Since red blood cells have a life span of about 120 days, the HbA1c average blood sugar level is an reflection of your values over the last eight to twelve weeks. This is critical process when assessing your values and comparing it to normal blood sugar level.

normal blood sugar level in patients

The HbA1c can be specified in units of percent and millimoles per mol (mmol / mol).
In people without diabetes, the HbA1c is around 30 mmol / mol (5 percent).

HbA1c: Individual target values

In type 1 diabetes, the Diabetes Association recommends an HbA1c level below 58 mmol / mol (7.5 percent), if there is no direct danger of hypoglycemia or other side effects. In type 2 diabetes, targets are set as 48-58 mmol / mol (6.5 to 7.5 percent). Normal blood sugar level standard stays the same – normal blood sugar level should be somewhere in between 72 mg/dL and 108 mg/dL (4 to 6 mmol/L),

The said target values ​​of blood sugar are recommended values ​​and not binding limits that must be achieved at all costs.

Normal blood sugar level chart

The blood glucose level (plasma glucose value) can be determined by 2 methods. These are: fasting plasma glucose (FPG): from capillary whole blood after a fasting period of at least 8 hours or oral glucose tolerance test (according to WHO guidelines): 3 days prior to the test at least 150-200 grams of carbohydrate per day for normal physical activity out, after 10-16 hours of fasting at 8am determine the fasting blood glucose and after the patient 75 g glucose dissolved in 250-300 ml of water, to drink within 5 minutes, -> measure blood sugar after 2 hours again.

In primary care area of ​​blood glucose is most often measured as fasting blood glucose value over blood glucose test strip or the laboratory. Unless you know your blood glucose levels, you can see from the following table below which is normal blood sugar level.

These are as follows.


  • Normal value Impaired glucose tolerance 100-125 mg / dl (5.6 to 6.9 mmol / l)
  • diabetes from 126 mg / dl (From 7.0 mmol / l)
  • oral glucose tolerance test after 2 hours
  • normal blood sugar level value as impaired glucose tolerance 140-199 mg / dl (7.7 to 11.0 mmol / l)
  • diabetes from 200 mg / dl (From 11.1 mmol / l)

Blood glucose values ​​show during the day as strong fluctuations, depending on the physical activity, food intake and overall health of an individual. A routinely collected, increased blood glucose value can therefore mean the diabetes diagnosis, suggestive of impaired glucose tolerance (eg Type II diabetes), or just be a result of a meal. Normal blood sugar level stays marginal.

Therefore, the WHO recommends the diagnosis as follows:
A diabetes disease occurs when a presence of classical symptoms of diabetes, including: polyuria (increased urine volume), polydipsia (increased thirst), unexplained weight loss and at the same time a glucose level of above 200 mg / dl at any time of the day, regardless of the last meal ingestion is given. Furthermore, fasting plasma glucose 126 mg / dl, or the oral glucose tolerance test, the 2-hour value above 200 mg / dl, and a confirmation of the results by repeating measurements at a later time is done (unless clear signs of hyperglycemia are present).

All blood glucose values ​​are determined from the capillary whole blood or blood plasma. Therefore normal blood sugar level should be deemed after all above considerations are taken into account.

normal blood sugar level value: 70 – 100 mg / dl. This means that after at least 12 hours fasting (fasting blood glucose) are between 60 and 100 milligrams of glucose in a deciliter of blood.
normal blood sugar level and limit range: 101 – 130 mg / dl. From about 180 mg / dl, the so-called renal threshold is exceeded. The sugar can then be detected in the urine (urine test strips).
Diabetes = permanently increased blood sugar levels.
Diabetes Type I = happens mostly in young patients (juvenile diabetes). It happens when organism destroys its own antibodies (insulin dependent diabetes).
Type II diabetes (adult-onset) = Caused by the metabolic syndrome patients have an increasing insulin resistance. The cells in the tissue take too little insulin from the blood. The body tries to reduce sugar levels in the blood (blood sugar) by causing the pancreas to produce more insulin which could be fatal if not treated. This eventually leads to exhaustion of the pancreas, which in its turn adjusts the insulin production.

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