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.
If you've eaten anything recently with yellow dye in it, that could also be a reason for bright yellow urine. Sometimes, very colorful urine indicates dehydration. The more concentrated urine is, the darker or richer the color of it is. If you have no other symptoms, such as pain with urination, abdominal pain, or lower back pain, your bright yellow urine probably doesn't mean anything, in terms of your overall health. If you develop any problems urinating or if the bright color persists, then by all means consult a medical professional.