LEA PATERSON / SCIENCE PHOTO LIBRARY LEA PATERSON / SCIENCE PHOTO LIBRARY
Blood sugar level testing in diabetes. Diabetic woman using a diagnostic device to check the level of glucose (a simple sugar) in her blood using a sample pricked from one of her fingers. Diabetes is a condition where the body is resistant to or fails to produce the insulin needed to break down sugars in the blood. If blood sugar levels are high, an injection of insulin may be needed.
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