2 doctors weighed in:

Why is the urine of patients with diabetes mellitus bright (almost neon) yellow? Also, what causes the pH spike with diabetes insipidus?

2 doctors weighed in
Dr. Edward Workman
Pain Management
1 doctor agrees

In brief: Dehydration, fillers

Bright urine most often comes from dehydration (too little fluid or excess loss of fluids), often seen in diabetes.
It can also come from the fillers and buffers in pills, including vitamins. pH spiking is alkalosis or excessively alkaline state from abnormal fluid and electrolyte dynamics. See your PCP or Endocrinologist for electrolyte lab work, and more info and discussion.

In brief: Dehydration, fillers

Bright urine most often comes from dehydration (too little fluid or excess loss of fluids), often seen in diabetes.
It can also come from the fillers and buffers in pills, including vitamins. pH spiking is alkalosis or excessively alkaline state from abnormal fluid and electrolyte dynamics. See your PCP or Endocrinologist for electrolyte lab work, and more info and discussion.
Dr. Edward Workman
Dr. Edward Workman
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