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Blood test

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Glucose test

Alternative Names: FBS; Blood sugar levels; Fasting blood sugar Normal Values: Levels up to 100 mg/dL are considered normal. Text Continues Below Levels between 100 and 126 mg/dl are referred to as impaired fasting glucose or pre-diabetes. These levels are considered to be risk factors for type 2 diabetes and its complications. Diabetes is typically diagnosed when fasting blood glucose levels are 126 mg/dl or higher. Note: mg/dL = milligrams per deciliter What abnormal results mean: Greater than normal levels (hyperglycemia) may indicate: Acromegaly (very rare) Cushing's syndrome (rare) Diabetes mellitus -- fasting blood glucose of greater than 126 mg/dL Impaired fasting glucose -- 110 to 126 mg/dL -- a prediabetic state Hyperthyroidism Pancreatic cancer Pancreatitis Pheochromocytoma (very rare) Insufficient amount of insulin Excessive food intake Lower than normal levels (hypoglycemia) may indicate: Hypopituitarism Hypothyroidism Insulinoma (very rare) Injection of too much insulin Insufficient dietary intake Additional conditions under which this test may be performed: Acute adrenal crisis Cushing's syndrome caused by adrenal tumor Cushing's syndrome - exogenous Delirium Dementia Dementia due to metabolic causes Diabetic hyperglycemic hyperosmolar coma Diabetic ketoacidosis Diabetic nephropathy/sclerosis Ectopic Cushing's syndrome Epilepsy Generalized tonic-clonic seizure Glucagonoma Islet of Langerhans' tumor Multiple endocrine neoplasia (MEN) I Pituitary Cushing's (Cushing's disease) Syphilis Syphilis - primary Syphilis - secondary Syphilis - tertiary Type 1 diabetes Type 2 diabetes Transient ischemic attack (TIA)

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