KATE JACOBS / SCIENCE PHOTO LIBRARY KATE JACOBS / SCIENCE PHOTO LIBRARY
Blood glucose test. Spot of blood emerging from a finger following a blood-glucose test. 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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