In various situations, diabetics might be told that StrictionBP Review getting sugars under 250mg/dL (14mmol/L) is good enough, or they might be told that any blood sugar under 60mg/dL (3.3mmol/L) could be deadly, or they might be told that the number 140mg/dL (7.8mmol/L) has "mystical significance." The fact is, managing the numbers isn't all there is to managing diabetes. Blood sugar levels are just a general guide to diabetes, but there are levels are definitely too high or definitely too low.
As a general rule, if your blood sugars go over 170mg/dL (9.4 mmol/L), even for a little while, your muscle and liver cells develop insulin resistance. This protects them from a flood of glucose that burns with the production of massive amounts of free radicals. Most of the science confirms that having your sugars go over 170mg/dL (9.4mmol/L) after you eat, slowly makes type 2 diabetes worse. You need to keep your after-meal (post-prandial) sugars in control, not just your fasting sugars. You probably won't feel bad if your sugars are 170mg/dL (9.4mmol/L), but any sugar level this high at any time will gradually make the underlying insulin resistance worse.
Of course, keeping your post-prandial sugars to 90mg/dL (5mmol/L) or so is optimal, but most diabetics need a lot of practice to do this! Just be sure you always need to control the upper limit of your blood sugars. Any reading over 400mg/dL (22mmol/L), ever, requires immediate medical attention, and persistent blood sugars over 200mg/dL (11mmol/L) also require drastic changes in care.