Testing for normal blood sugar
Part 1: What is a normal blood sugar?
The most popular search that brings in
visitors to any diabetes website is: "What is a
normal blood sugar?"
The answer isn't really simple, as blood
sugar (glucose) can vary quite widely
throughout the day, depending not only on what
you eat, but also on what you are doing.
However, if you want a simple answer, here
it is, using the criteria usually used by
Normal fasting blood glucose
The most meaningful instant reading of blood
glucose is a fasting one. Thisl is the level
you should see just before eating. To ensure
that a previous meal does not skew the
readings, this measurement is usually taken
'Normal' is reckoned to be no more than
4.6 mmol/l in Europe or
83 mg/dl in the USA, although
for many healthy people fasting blood glucose
around 3.9 - 4.0 mmol/l (mid to high 70 mg/dl)
range is more usual.
Most doctors will tell you any fasting blood
sugar under 5.6 mmol/L (100 mg/dl ) iis
"normal", but there are several studies
whichsuggest that a fasting blood sugar over 5
mmol/L (~ 95 mg/dl) range often predicts the
beginnings of diabetes that may not be
diagnosed for another several years.
Postprandial (after-meal) blood sugar
Despite what is eaten, the blood glucose
level of a truly healthy person after a meal
No more than 6.6 mmol/L
(120 mg/dl) one or two hours
after a meal. Most healthy people are under
5.5 mmol/L (100
mg/dl) two hours after eating.