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.
Dehydration. Urine that is dark yellow in color is often a sign that one is dehydrated, or not drinking enough water. This can also happen when an individual sweats a lot, and does not replenish the lost water. Other important factors that can lead to dehydration are excessive vomiting and diarrhea.ark Yellow Urine Causes. The natural color of urine is pale yellow, however, it can become dark yellow, brown, or reddish in color, due to a number of factors like dehydration, and the intake of certain foods and medications.