blood sugar levels for adults after fasting goes up?
Normally, the fasting blood sugar in adults is around 100 mg /dL or lower â according to WebMD. But if it is higher than 100 mg /dL, it is considered abnormal. If left untreated, it may rise higher than 130 mg /dL which then can be considered into a condition called hyperglycemia.t may point to a condition called pre-diabetes (the phase prior to diabetes â as the name suggests). The normal range of blood sugar levels means that you the level of sugar /glucose in your bloodstream is not too high (hyperglycemia) or too low (hypoglycemia).