What is the normal range for adult fasting blood glucose?

Normal fasting blood glucose is 70-100 mg/dL (3.9-5.5 mmol/L). Values 100-125 mg/dL indicate prediabetes (impaired fasting glucose); 126 mg/dL or higher on two separate tests indicates diabetes. Hypoglycemia (below 70) causes shakiness, sweating, anxiety, hunger, confusion, and at severe levels (below 40-50) seizures, loss of consciousness, and death. Treatment of hypoglycemia in a conscious client: 15-20 grams of fast-acting carbohydrate (4 oz juice, 3-4 glucose tablets, 1 tbsp honey), then recheck in 15 minutes; repeat if still low; once normal, provide complex carb and protein snack. For unconscious clients: IV dextrose (D50) or IM/SQ glucagon. Hyperglycemia symptoms: polyuria, polydipsia, polyphagia, fatigue, blurred vision. Diabetic ketoacidosis (DKA) is a serious complication of type 1 diabetes with glucose typically over 300, ketones, acidosis.