MARK SYKES / SCIENCE PHOTO LIBRARY MARK SYKES / SCIENCE PHOTO LIBRARY
Blood glucose test. Woman pricking her finger with a lancet to test her blood sugar (glucose) levels. Diabetics have to perform this test regularly. Diabetes is a metabolic disorder in which unused sugars accumulate in the blood and urine. Monitoring of blood glucose levels allows diabetics to control the disease through diet, medication and in some cases insulin injections.
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