Insulin is a naturally occurring hormone made by the pancreas that helps our body use or store the glucose (sugar) it gets from food. For people with diabetes, either the pancreas does not make enough insulin to meet the body's requirements, or the body cannot properly use the insulin that is made.
The yellow color in normal urine comes from a substance known as urochrome. Urochrome is also known as urobilin and is the result of hemoglobin breakdown. Hemoglobin is the protein in red blood cells that enables oxygen to be taken around the body.
The color of the urine is affected by a pigment called urochrome. Urine odor and color depends not only on the foods and beverages we consume throughout the day but on the medications we take and underlying medical conditions. Dark yellow urine can have multiple causes in nature both harmless and serious. If a person is dehydrated or simply not drinking enough liquids he will end up with dark yellow urine. As soon as the liquid intake is increased, the urine will quickly change its color to a straw-like light yellow.