 This leads people to use different "cutoff levels" of glucose in different contexts and for different purposes.Because of all the variations, the Endocrine Society recommends that a diagnosis of hypoglycemia as a problem for an individual be based on the combination of a low glucose level and evidence of adverse effects.Glucose concentrations are expressed as milligrams per deciliter (mg/dL or mg/100 mL) in Lebanon, the United States, Japan, Portugal, Spain, France, Belgium, Egypt, Turkey, Saudi Arabia, Colombia, India and Israel, while millimoles per liter (mmol/L or mM) are the units used in most of the rest of the world.