Good afternoon. We need to start with the fact that the sugar rate depends on the sex and age of the person. In this case, the indicators of the norm of sugar will be different if you take a blood test from a finger and a vein. This indicator is measured in mmol / L and for example for men, depending on age, it can vary from 2.5 to 6.9 mmol / L. You can read more about the sugar norm in this article: https://l03.ru/analizy/14-norma-soderzhaniya-sahara-v-krovi-u-muzhchin-po-vozrastu.html
The glucose reading depends on the patient's age. For an adult (14-60 years old), the blood glucose level should be within 4.1 - 5.9 mmol \ l .
However, it is important to note that depending on the laboratory in which the study takes place, the norms of this indicator may vary. As a rule, the norms that are valid for a given laboratory are indicated on the results sheet.
With an increase in glucose levels in some situations, it may additionally require a study of the level of glycosylated hemoglobin or a glucose tolerance test. These additional studies are aimed at identifying disorders of carbohydrate metabolism (excluding diabetes mellitus).
It is important to emphasize that in order to obtain correct results, it is important to donate blood strictly on an empty stomach (no food intake for 8 14 hours), it is advisable not to drink water in the morning, as well as not to brush your teeth (these actions can lead to a change in the indicator).
If the blood glucose level is outside the normal range, you should consult an endocrinologist or therapist for determination of tactics for further actions. It should be noted that both high and low glucose levels can lead to the development of complications.