Can dehydration cause orange urine? can eating fritos that have orange seasoning cause it too?

Yes: Yes...the less one drinks the more concentrated the urine color.or just the opposite .like after 2-3 beers the urine can be almost like water Foods. Such as beets and coloring in processed foods can change urine color.

Orange Urine: Dehydration can lead to orange urine. There are also reports of Frito products leading to orange urine. I don't know if they still use Tartrazine in their products but that could be an issue.