10 Causes of Lightheadedness
2. Hypoglycemia
Hypoglycemia refers to a decrease in blood sugar (glucose) to levels where related signs or symptoms appear. This threshold varies greatly from person to person, but it is generally at a fasting blood sugar of <50 mg/dl. There are many causes of hypoglycemia, but it is most often seen in people with diabetes.
Recall that the body uses glucose as its main energy source. Hence, if it falls below a person’s normal levels, every system in their body starts to use glucose reserves (i.e. glycogen) to function. However, the brain needs a constant supply of glucose to function properly. If the brain is not properly fueled, symptoms of hypoglycemia can appear. Signs and symptoms of hypoglycemia include lightheadedness, dizziness, confusion, blurred vision, sweating, increased heart rate, among others.
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