Your range should be set by your Doctor because it can be quite individual

There is some (national standards) for the average diabetic (if there is such a thing)

Generally the "range" is (Phone number can only be seen by the question and answer creators) mmols)

In the UK the range is more restricted at 4.0 - 8.5 (72 - 153)

And if you are otherwise healthy (no heart/kidney issues) then going with a range of 4.0-7.8 or 72 to 140 is the "healthiest" range and will prevent or significantly delay the onset of Diabetic Complications

But as we age your sugar range can usually become a little more liberal since (without being morbid) there comes a point where a complication that takes 20 years to develop may not be a concern so no need to restrict blood sugar to prevent that = can run a little higher range without an issue

(my personal range set with my Doc is 4.0 - 8.0 or 72 - 144)

My bs range is 4.5-7.0

What dosage do I need for chromium and magnesium?

I try to keep mine between 80 and 120 but u probably need to ask Graham?