What are the dangers of abnormal sugar levels?

What are the dangers of abnormal sugar levels? and what level is normal? These are important health questions that demand answers. To get these answers, keep reading.
What is the alarming level of sugar?
A blood sugar level less than 140 mg/dL (7.8 mmol/L) is normal. A reading of more than 200 mg/dL (11.1 mmol/L) after two hours indicates diabetes. A reading between 140 and 199 mg/dL (7.8 mmol/L and 11.0 mmol/L) indicates prediabetes.
What are the dangers of abnormal sugar levels?
High blood sugar, also called hyperglycemia, is a medical terminology to define significantly high glucose levels in the blood because of impaired glucose metabolism. A fasting blood glucose level of more than 125 mg/dl and a postprandial blood glucose level of more than 180 mg/dl is regarded as high blood sugar.
In general, a blood sugar reading of more than 180 mg/dL or any reading above your target range is too high.
A blood sugar reading of 300 mg/dL or more can be dangerous. If you have 2 readings in a row of 300 or more, call your doctor
Both hypo- and hyperglycemia affect how you feel. First of all, the brain suffers, because its cells consume about half of all energy supplied by glucose.
Dizziness, loss of concentration, weakness, darkening of the eyes, and trembling hands are common symptoms for both low and high blood sugar levels.
With constant hyperglycemia, glucose accumulates in organs and tissues and becomes toxic – begins to destroy the liver, kidneys, retina, blood vessels, heart, nervous system.
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