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Dawn phenomenon is a normal early-morning rise in glucose (blood sugar) that occurs before or shortly after
waking. Everybody experiences this physiological phenomenon,but it can be troublesome for people with diabetes.
Such people may need to adjust their treatment regimen to account for dawn phenomenon.
Between 4 a.m. and 8 a.m., the body increases the production of certain hormones. These
natural body chemicals suppress the activity of insulin, a hormone that transports glucose
into cells to use for energy and reduces blood sugar levels.
The hormones include:
These hormones trigger the liver to release enough glucose to give the body the energy
to wake up. In non-diabetic people, the body responds to the excess glucose that
accumulates as a result of this process by producing insulin. The insulin then moves the
excess glucose into the cells. However, people with diabetes either fail to produce insulin
or cannot properly use the insulin that is available. As a result, glucose continues to rise
to abnormally high levels (hyperglycemia).
This interfere with treatment of patients with diabetes especially when it comes to dosing of the insulin
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