Sugar sucks up water so that it can flow from the body. The result is polyuria or excessive urination. People with excess glucose in their blood, as in uncontrolled diabetes, make frequent trips to the bathroom. Loss of water through urination triggers the brain to send a message of thirst. This results in a condition called polydipsia, or excessive thirst.
Excessive urination can result in dehydration, leading to dry skin.
Blurred vision can be caused by fluctuations in the amount of glucose and water in the lenses in your eyes during periods of dehydration. When there is no insulin to funnel glucose into the body s cells, or when the insulin funnel is not working to pass glucose through the receptors, the cells get no fuel and they starve. This triggers the brain to send a message of hunger, resulting in polyphagia or excessive hunger. Because the glucose that should be fueling your cells is flowing out in urine, the cells cannot produce energy, and without energy, you may feel weak or tired. Weight loss may occur in people whose bodies produce no insulin because without insulin, no fuel enters their cells.