Fasting Blood Sugar
In this article we will consider how "normal" these normal levels FBS are - according to the scientific literature. We will also look at which of these three markers is most important for the prevention of diabetes, diabetes and cardiovascular disease. But before we do that, I would like to make an important point: context is everything.
As Dr. Slinkin said in part one of this series, there are potential problems with how well these tests are used to diagnose diabetes. This is an area that requires further research, but constant monitoring of glucose for the general public can be a better marker.
In his work with patients he never uses a single marker to determine if someone has a blood sugar FBS problem. I perform a complete blood test which includes on an empty stomach glucose, insulin on an empty stomach, A1c, fructozamine, uric acid and triglycerides (along with other lipids) and make them do a post test at home for 3 days with different foods.
If they have a few post-acceptance spikes and all other markers or are normal, I am not worried. If they have high levels of BG, A1c and fructozamine on an empty stomach and they have spikes, I am concerned and will do further tests.
On a similar note, Denis wrote that A1c is not a reliable marker for people because of the context: there are many conditions unrelated to blood sugar that can make A1c look high or low. So if someone is normal on all the other blood sugar markers, but they have high A1c, that doesn't usually bother me.
Given all this, let's look at some research.
According to continuous monitoring of glucose in healthy people, normal blood sugar levels FBS at the post are 89 mg/dL or less. Many normal people have blood sugar at their posts in the middle and early 70s.
Although most doctors will tell you that anything below 100 mg/dL is normal, it may not be so. In this study, people with FBS above 95 were more than 3 times more likely to develop diabetes in the future than people with FBH below 90. This study showed a gradual increase in the risk of heart disease in men with FBH above 85 mg/dL, compared to men with FBH 81 mg/dL and below.