The ELISA (enzyme-linked immunosorbent assay) is a test which uses color change and antibodies to identify a substance. An indirect ELISA is one of three ELISA tests.
Urine varies in appearance, depending principally upon a body's level of hydration, as well as other factors. Normal urine is a transparent solution ranging from colorless to amber but is usually a pale yellow. In the urine of a healthy individual the color comes primarily from the presence of urobilin.
Clear urine CAN mean youâre healthy. Typically, the healthier you are, the lighter your urine color. While you would think that clear urine would mean a well hydrated, healthy body, it may actually be a symptom of some other issues. The ideal healthy urine color is actually a straw yellow color. Clear urine that does not appear to have any color can mean that you are healthy and have a well-hydrated body, but it could also mean that you are over hydrated and risk water intoxication (water poisoning) or you may even have diabetes. Well, diabetes can be accompanied by increased thirst and frequent urination.