For the majority of healthy individuals, normal blood sugar levels are as follows: Between 4.0 to 5.4 mmol/L (72 to 99 mg/dL) when fasting [361] Up to 7.8 mmol/L (140 mg/dL) 2 hours after eating. For people with diabetes, blood sugar level targets are as follows: Before meals : 4 to 7 mmol/L for people with type 1 or type 2 diabetes. More @Wikipedia
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